Planning & Risk

Altcoin Diversification: Does Holding 15 Coins Protect You?

Bullrunners tested 15 altcoins against Bitcoin over 12 months. The spread lost 44% versus 26%. Why altcoins crash together and three questions to check yours.

Video: Altcoin Diversification: Does Holding 15 Coins Protect You?

Key takeaways

  • In Bullrunners' 12-month test, money spread evenly across 15 large altcoins lost about 44%, while holding only Bitcoin lost about 26%.
  • On the video's 0-to-1 score, the typical altcoin tested scored about 0.73 with Bitcoin and Ethereum scored 0.93, so most coins moved with Bitcoin most of the time.
  • According to the video, almost every altcoin fell together on the worst market days, usually harder than Bitcoin, which is when diversification is supposed to help most.
  • Leveraged derivatives trading spreads selling across unrelated coins, because exchanges can sell any collateral a trader has posted.
  • The video suggests treating coins that all go red together as one position, sizing that position as a single bet, and checking whether anything you hold is used for reasons that do not depend on market mood.

Holding many altcoins did not protect investors over the past year, according to a Bullrunners test. Money spread evenly across 15 large altcoins, including Ethereum, XRP, Polkadot and Avalanche, would be down about 44% after 12 months. The same money held only in Bitcoin would be down about 26%. On the worst days, nearly every coin fell together.

Many holders own a long list of coins because it feels safer. The idea is that if one coin goes wrong, the others carry the portfolio. The video tests that idea against a year of market data. The result matters for anyone who assumes that owning more coins means taking less risk.

What did the Bullrunners test measure?

The Bullrunners test compared an equal split across 15 big altcoins with simply holding Bitcoin over the last 12 months. It then looked at the worst stretches of the year, coin by coin, to see whether the altcoins cushioned the drops.

The full-year results, according to the video:

  • 14 of the 15 altcoins ended the year down, and the typical one lost about 45%.
  • The even spread lost about 44%. Bitcoin lost about 26%.
  • $1,000 spread across the altcoins would be worth about $560. The same $1,000 in Bitcoin would be worth about $740.
  • At the worst point of the bear market, the spread was down about 59%, against Bitcoin’s worst of about 48%.

The video also says about three quarters of the ups and downs in those coins lined up with Bitcoin’s. On that reading, holding them was still mostly a bet on where Bitcoin goes, only with bigger swings.

What happened to altcoins on October 10?

October 10, 2025 saw more forced selling in crypto than any day before it. The US-China trade war heated up, and in about 24 hours exchanges closed out the leveraged bets of more than 1.6 million traders, worth about $19 billion. For more on how that kind of selling affects leveraged funds, see these lessons from leveraged 3x crypto ETFs during liquidations.

The video says every coin in its test fell that day. By its figures, Bitcoin dropped about 7%, while Polkadot and Avalanche dropped about 27%, close to four times as much. The video also says 14 of the 15 altcoins fell harder than Bitcoin. Whichever ones an investor had picked, they moved the same way.

The video says the pattern repeated on February 5, 2026. It reports that XRP fell nearly 19% in a day and Chainlink erased every gain it had made since October 2023. According to the video, Bitcoin fell about 14% that day, and Ethereum, Solana, Dogecoin, Avalanche, Chainlink and Cardano each fell about 14% to 15%. Six coins built for very different purposes behaved like one.

How closely do altcoins follow Bitcoin?

Most altcoins in the test followed Bitcoin closely, with a typical score of about 0.73 on the video’s correlation scale. That scale is a simplified score from 0 to 1. A 1 means the coin moves right along with Bitcoin every time. A 0 means the two have nothing to do with each other.

Ethereum scored 0.93, despite having its own network, apps and users. Across Bitcoin’s 10 worst stretches of the year, the video says almost all the coins fell too. Bitcoin dropped between 7% and 8% on average in those stretches, by the video’s count, and the altcoins dropped about 9%.

The figures below are the ones the video gives:

Coin October 10 drop 12-month result Score with Bitcoin
Bitcoin About 7% Down about 26% —
Ethereum Not stated Not stated 0.93
Polkadot About 27% Not stated Not stated
Avalanche About 27% Not stated Not stated
Tron About 5% Up about 5% About 0.35
Typical altcoin tested Fell harder than Bitcoin Down about 45% About 0.73

The same idea applies to pairs of coins investors often hold together, covered in whether XRP and XLM are the same bet twice.

Michael Nadeau, who runs the crypto research newsletter The DeFi Report, said in a clip shown in the video that he expects these assets to trade more independently over time. For now, he said, everything is still priced relative to Bitcoin, so a view on any altcoin first needs a view on Bitcoin.

Why do different altcoins crash at the same time?

According to the video, altcoins crash together mainly because of how crypto is traded. In March 2026, about three quarters of trading on the big exchanges was in derivatives, which are bets on where the price goes next. Many of those bets use borrowed money.

The chain reaction works like this:

  1. A trader posts coins, say Solana and Dogecoin, as collateral to borrow for a bigger bet.
  2. The market drops far enough that the loan is at risk.
  3. The exchange automatically sells the collateral, including coins that were doing fine.
  4. That selling pushes more prices down, forcing more traders out, and the cycle spreads.

CoinShares, a large crypto investment firm, gave what the video calls the clearest breakdown of October 10. Citing analytics firm Coinwatch, CoinShares said the firms that normally keep buy and sell orders on exchanges pulled back, leaving almost nobody to buy. Cosmos briefly fell from about $4 to a tenth of a cent on Binance, and about $50 billion of open bets disappeared in less than a day.

The video also says Bitcoin has deeper support. It reports that, at the time of recording, US Bitcoin ETFs held about $108 billion and Ethereum ETFs about $14.6 billion, while most altcoins have nothing close. After October 10, data firm Kaiko found that trading in coins like Ethereum, XRP, Solana and Dogecoin fell about 60%. Orders waiting near the price on the big coins shrank from about $2.6 million to about $1.7 million. Thinner order books mean less selling is needed to push prices down.

What does outside research say?

Outside research cited in the video points the same way. The paper, titled “Crashing together, rallying apart,” studied 13 of the largest coins using data from late 2021 to 2025. The video says its authors are at IE University in Spain. They found that the protection from spreading money across crypto very nearly disappears on the most extreme days. They also found that common risk models underestimate the chance of everything crashing at once by roughly eight times. The paper was posted as a preprint and has not yet been peer reviewed.

The title captures the pattern. In calm weeks and rallies, coins drift apart, which is why holding many feels safe. In crashes, they snap back together.

A separate study of Bitcoin and 18 altcoins, using data from January 2021 to September 2025, found that Bitcoin has moved more independently of altcoins since the US Bitcoin ETFs launched in 2024. The video adds that on the worst days, the coins still fell as one.

Why did Tron hold up when other coins fell?

Tron was the exception in the test, and the video links that to how the network is used. According to the video, Tron finished the year up about 5% and fell only about 5% on October 10. It also had the lowest score with Bitcoin in the group, at about 0.35.

The video says Tron is mainly used to move stablecoins, the digital dollars such as Tether. About half of all Tether sits on Tron. About 73% of stablecoin volume in the third quarter ran through it, according to a CoinDesk report that Tron paid for. People sending dollars keep doing so whether markets are up or down.

The video uses Tron as an example, not a recommendation, and Tron still fell on October 10. The point is the trait to look for: a reason to be used that has nothing to do with speculation. For related checks on a coin’s fundamentals, see three checks for spotting a bad altcoin.

Three questions to check your own diversification

The video offers three questions to test how spread out a portfolio really is:

  1. How much of it moves together? The video suggests looking at your coins on the next bad day. If they all go red at once, it says to count them as one position, not several.
  2. How big is that one position? Add up everything that falls when the market falls, and the video suggests viewing that total as a single bet.
  3. Does anything you hold get used for a reason that doesn’t depend on market mood? The video’s example is people sending dollars on Tron. If nothing qualifies, the video argues, the number of coins owned is doing little to protect the portfolio.

The video notes these questions are harder to answer than they sound. Each coin was picked for its own reason, so on a phone screen they look like separate bets. Often their connection only becomes clear in the middle of a crash.

What to watch next

Watch whether altcoin correlations with Bitcoin keep easing, as the post-ETF study suggests, or snap back on the next sharp drop. Watch order book depth and derivatives activity, too. Thin liquidity and heavy leverage are what turned October 10 into a market-wide sell-off. The next time the market has a bad day, it is worth noting which holdings fall together. By the video’s logic, that group is one position, however many coins are in it.

Frequently asked questions

Does holding many altcoins diversify a crypto portfolio?

According to the Bullrunners test, not much. Over the past 12 months, an even split across 15 large altcoins lost about 44% while Bitcoin alone lost about 26%, and nearly all the coins fell together on the worst days.

What is correlation with Bitcoin?

Correlation measures how closely a coin moves with Bitcoin. The video uses a simplified score from 0 to 1, where 1 means the coin moves right along with Bitcoin and 0 means no relationship. On that score, the typical coin in the video scored about 0.73 and Ethereum scored 0.93.

Why do altcoins fall at the same time as Bitcoin?

The video points to leveraged derivatives trading, which made up about three quarters of trading on big exchanges in March 2026. When prices drop, exchanges automatically sell traders' collateral, including unrelated coins, which pushes more prices down.

Why did Tron hold up better than other altcoins?

The video says Tron is mainly used to move stablecoins such as Tether, so much of its activity continues whether markets rise or fall. According to the video, it finished the year up about 5% and had the lowest score with Bitcoin in the group, about 0.35, though it still fell on October 10.

What happened in the crypto crash of October 10, 2025?

As the US-China trade war heated up, about $19 billion of leveraged bets from more than 1.6 million traders were wiped out in about 24 hours. The video says every coin it tested fell that day, and 14 of the 15 fell harder than Bitcoin.

Full video transcript

From the video's captions, lightly formatted. Captions can mishear names and numbers, so check figures against the article above.

If you hold a lot of different altcoins, there's a good chance you did it to stay safe and diversify. You spread your money out. So, if one coin goes wrong, the others carry your portfolio and you don't get absolutely destroyed. So, we checked whether it works. We picked 15 big altcoins.

Ethereum's in there. So is XRP, Polka Dot, even Avalanche. Then, we spread money evenly across all of them for the last 12 months and put it next to just holding [music] Bitcoin. spread out like that, you'd be down about 44% right now. Just holding Bitcoin, you'd be down about 26%. Now, look at the biggest drops of the year, and those are the days you were counting on the other coins to carry you. [music] And every time, almost all of them fell together.

So, does spreading your money across lots of altcoins actually protect you? We went through the worst days of the last year, coin bycoin, to see what really happens to your money when the market drops. and we'll show you how to check your own coins with [music] three quick questions. Let's run it. All right, bull runners. Welcome back to the channel.

Now, the best place to start is the day crypto saw more force selling than ever before. That was October 10th of last year. The US China trade war heated up that day and crypto fell hard. In about 24 hours, the exchanges wiped out the bets of more than$1.6 million traders. That's about $19 billion worth of bets closed in a single day.

Now, check this out. This is what happened to the coins we checked that day. Every single one of them fell. Bitcoin dropped about 7%. Polka Dot and Avalanche dropped about 27%.

Almost four times as much. And 14 of the 15 fell harder than Bitcoin did. So, if you'd spread your money across coins like these, whichever ones you picked, they all went the same way that same day. You might think that was just one bad day. But when we looked at the whole year, the same thing kept happening.

To show you, we gave each coin a score for how closely it follows Bitcoin. It goes from 0ero to one. A one means every time Bitcoin moves, the coin moves right along with it. It's correlated. A zero means the two have nothing to do with each other.

They're not correlated. Over the last 12 months, the typical coin we checked scored about 0.73. So most of the time when Bitcoin moved, it moved two in the same direction. Ethereum scored 0.93. So think about that.

Ethereum has its own network, its own apps, its own users, its own use case compared to Bitcoin, and it still moved almost exactly like Bitcoin. And it got worse on the bad days. Remember those big drops I mentioned at the start? We took Bitcoin's 10 worst stretches of the year, a few bad days each. And every one of them, almost all the coins we checked fell, too.

Bitcoin dropped about 7 12% on average, and the altcoins dropped about 9%. So on the days you'd most want the other coins to carry you, they fell even harder than Bitcoin. And it happened again this year. On February 5th, XRP dropped nearly 19% in a day, down to about a$124. And Chain Link wiped out every gain it had made since October of 2023.

Now look at the whole board that day. Bitcoin fell about 14% and Ethereum, Salana, Dogecoin, Avalanche, Chain Link, and Cardano all fell about 14 or 15%, too. Those are six coins built for completely different things. If you'd spread your money across all six, it would have looked like you only held one. Now, some people do expect this to change.

One of them is Michael Nadio. He runs the DeFi Report, a crypto research newsletter, and he thinks these coins should start going their own way, but listen to what he says still comes first.

I think, you know, over time, we should start to see these assets start to trade independently of each other. But I'd say right now, uh, everything is still sort of being priced relative to what Bitcoin is doing. And so um if you have a view on ETH, if you have a view on, you know, other altcoins in the market, in my view, you first have to have a thesis and a view for what Bitcoin is going to be doing.

And that goes for whatever altcoins you hold. Where Bitcoin goes next still decides a lot of what happens to them. So why do coins with completely different jobs, narratives, use cases all fall at the same time? Great question. Well, a lot of it comes down to how people trade crypto.

You see, in March of this year, about threearters of all trading on the big exchanges was in derivatives. In plain terms, those are bets on where the price goes next. And a lot of those bets are made with borrowed money. Here's how that drags everything down together. Say a trader puts up some Salana and some Dogecoin to borrow money for a bigger bet.

If the market drops far enough, the exchange sells for them automatically to cover the loan, and it can sell anything they put up, even a coin that was doing fine. So, a drop in one coin turns into selling of other coins that had nothing to do with it. And that selling pushes prices lower, which forces more traders out, and it creates a domino effect that keeps spreading. And that's exactly what happened on October 10th. The clearest breakdown of that day came from a big crypto investment firm called Coinshares.

It found that the firms that normally keep buy and sell orders on the exchanges pulled back, so there was almost nobody left to buy. Cosmos briefly fell from about $4 to a tenth of a cent on Binance. And in less than a day, about $50 billion dollar of open bets were gone. So, when every coin you own goes red at once, it's usually because the exchanges are forcing the same traders to sell everything at the same time. And there's another reason Bitcoin held up better.

It has a lot more money sitting behind it. At the time I'm recording this video, the US Bitcoin ETFs, which are the funds you can buy through a normal brokerage account, hold about $ 108 billion. The Ethereum ones hold about 14.6 billion. Most altcoins have nothing close to that. So when the market drops, there's a much deeper pool of money around Bitcoin, and the altcoins are left with whoever is still trading them.

And for altcoins, that crowd got a lot thinner after October 10th. You can see it in the numbers from a crypto data firm called Kao. Trading in coins like Ethereum, XRP, Salana, and Dogecoin fell about 60% after the crash. And on the big ones, the orders waiting close to the price shrank from about $2.6 million to about 1.7 million. Fewer orders waiting means it takes less selling to push the price down.

So, the next big drop can go further and much faster. So, if they all fall together, does owning more of them help at all? Well, over the last year, it left you worse off than just holding Bitcoin. Here's how the whole year looked side by side. Now, 14 of the 15 coins ended the year down, and the typical one lost about 45%.

With your money spread evenly across all of them, you'd have lost about 44%. Bitcoin lost about 26%. So, think about what that means for your money. A $1,000 spread that way would be worth about $560 today. The same $1,000 in just Bitcoin would be worth about $740.

And at the worst point of the year in the bare market, that spread out money was down about 59%. Bitcoin's worst was about 48%. On top of that, about 3/4 of the ups and downs in those coins lined up with bitcoins. So holding all those coins was really still a bet on where Bitcoin goes. When Bitcoin fell, they fell the same way, only further.

And it's not just our numbers. Researchers at IE University in Spain looked at 13 of the biggest coins from 2020 to June of 2026. Over the course of six years, they found the protection you get from spreading out inside crypto very nearly disappears on the most extreme days. And the usual risk models put the chance of everything crashing at once about eight times too low. The paper hasn't been peer- reviewed yet, but it lines up with what we found.

And the name of the paper explains it. crashing together, rallying apart. In calm weeks and in rallies, coins do drift apart a bit. One pumps, another doesn't. It's like what happened with Zcash recently near Protocol, but yet XRP was trading sideways or even down. That's why holding lots of them feels safe.

But when the market crashes, they all snap back together. So spreading out helps on the good days and it stops helping on the days that you'd actually need it when the market crashes. And to be fair, there are signs this is slowly changing. Another study of Bitcoin in 18 altcoins found that coins have been moving a bit more on their own since the Bitcoin ETFs launched in 2024, but on the worst days, they still fell as one. And that's what makes this so hard to swallow.

You didn't put all of your eggs in one basket, and that was the sensible thing to do. It's just that in crypto, most coins still go up and down with Bitcoin. So spreading your money across them spreads the risk a lot less than it feels like it should. But one coin we checked went its own way. So, we'll use it as an example because it shows what a coin needs to hold up when everything else falls.

And it's Tron. It finished the year up about 5% while Bitcoin lost about 26%. Its score with Bitcoin was about 0.35, the lowest of the whole group by far. Remember, Ethereum's was 0.93 and on October 10th, while Polka Dot lost about 27%, Tron lost only 5%. So, what was different about Tron that we need to understand?

Well, it comes down to what people actually use it for. Tron is mainly used for moving digital dollars, the coins people call stable coins. About half of all Tether, the biggest of those digital dollars sits on Tron. And in the third quarter, about 73% of all stable coin volume ran through it. Now, that's from a Coindesk report that Tron paid for.

So, a lot of people using Tron are just sending dollars and they keep doing that whether the market is up or down. Now, that means the coin that held up had a reason to be used that had nothing to do with the market's mood. And Tron can still drop with everything else. It fell on October 10th, too. But over the last 12 months, it had something holding it up.

And Tron is just an example here. What matters is what it shows you to look for in your own coins in your portfolio. So, here's where that leaves you. Over the last year, holding lots of altcoins didn't spread your risk that much because they mostly went up and down together. And when the market dropped, you lost more than if you just held Bitcoin or stable coins.

But you can check how spread out your coins really are with these three questions. First, how much of it moves together? Look at your coins on the next bad day. If they all go red at once, count them as just one position, not diversification. Second, how big is that one position?

Add up everything that falls when the market falls and look at that total as a single bet. And third, does anything you hold get used for a reason that doesn't depend on the market's mood, like the people sending dollars on Tron. If nothing does, the number of coins you own isn't doing much to protect you. Now, those questions sound simple, but answering them about your coins is harder than it looks because your emotions might be attached to them. You see, you picked each coin for its own reason.

So, on your phone, they look like separate bets. They look like you're diversifying. And the only time you really see how tied together they are is in the middle of a crash when every one of them goes red at once. Now, you don't have to wait for the next crash to find out. What I've done is I filmed a free training for you through the link in the description below.

Click that right now. Watch that video. If it makes sense, book a strategy call with an expert on my team. On that call, my team looks at the coins that you actually hold and runs them through those same three questions with you. They check how much of it moves together, how big that one position really is, and what a crash would cost you.

So, by the next time a big drop comes in the market or a black swan event, you already know what spreading out should look like for you, not just in different altcoins, but in different strategies. That includes your long-term holdings, your stable coin yield, your DeFi yield, your day trading, your swing trading strategies, and how much you have in cash versus crypto. So that way you can be fully ready for whatever the market throws your way. So if that sounds good to you, it's the first link in the description, the one that says get your free crypto portfolio review. If you're watching this on mobile, tap more.

It's the link right at the top. There's a short video, a quick form, then you pick a time to speak with an expert on my team. So as always, I will see you on the next video. I will see you at the top. You know what to do.

Stay bullish. Hey, hey, hey, hey. [music]

Education and commentary only, not financial advice. Crypto is volatile and you can lose money. Do your own research and speak to a qualified advisor before making investment decisions. Figures and quotes are as reported in the video on October 26, 2026 and may have changed since.