In the current landscape of the cryptocurrency market, single-crypto exchange-traded funds (ETFs), particularly those focused on Bitcoin (BTC), have gained significant traction. These spot Bitcoin ETFs have collectively attracted over $100 billion from investors. However, the performance of Bitcoin has raised concerns, with a notable decline of nearly 20% this year and a staggering drop of about 45% from its all-time high of $126,000 reached in October.
Given this downturn, one might ask whether investors should consider a more diversified approach by opting for ETFs that include a broader range of cryptocurrencies. Diversification remains a key principle in investment strategies, particularly as outlined in Modern Portfolio Theory. It advocates against concentrating investments in a single asset class to minimize risk.
In traditional finance, diversified ETFs—such as those tracking the S&P 500—are immensely popular. They allow investors to spread their risk across various sectors or regions. Coinciding with this trend, Coinbase Global has introduced the Coinbase 50 Index, which tracks a wide array of cryptocurrencies and crypto assets, ostensibly offering diversification benefits.
However, empirical evidence from the crypto market indicates that these theoretical advantages might not translate into practical gains. As of April 9, 2026, Bitcoin was down 17% year-to-date, while broader crypto indices, like the CoinMarketCap 20 Index, fared even worse, declining by 23%. Interestingly, despite diversifying across multiple cryptocurrencies, ETFs like the Bitwise 10 Crypto Index ETF—designed to provide exposure to ten different cryptocurrencies—have also seen substantial losses, down 22% in 2026.
This begs the question: Can multi-crypto ETFs outperform Bitcoin? Given that Bitcoin holds a commanding 60% share of the overall crypto market’s market cap, fundamentally, any diversified ETF that is market-weighted will still be heavily invested in Bitcoin. For instance, the Coinbase 50 Index, while tracking 50 cryptocurrencies, maintains a significant 50% allocation to Bitcoin in order to reflect the overall market dynamics.
Moreover, the correlation of Bitcoin to other major cryptocurrencies, notably Ethereum (ETH), complicates the diversification argument further. Historically, the correlation between Bitcoin and Ethereum has been approximately 0.90, indicating that these assets tend to move in tandem. This strong correlation suggests that shifting funds from Bitcoin to Ethereum is unlikely to yield vast differences in performance during market fluctuations.
Evidence shows that finding cryptocurrencies that move independently of Bitcoin is quite challenging. Data indicates that most cryptocurrencies maintain a correlation rate of 0.70 or higher with Bitcoin. Consequently, when Bitcoin underperforms, other cryptocurrencies typically follow suit.
In summary, while the concept of diversification remains appealing, it does not necessarily offer the downside protection many investors hope for in the cryptocurrency sector. The market remains highly correlated, and Bitcoin continues to dominate. This analysis is not an endorsement of Bitcoin maximalism nor a recommendation against engaging with diversified crypto investments; rather, it highlights the importance of discerning which investments will perform best during periods of market volatility. For now, many investors may find themselves better off concentrating on Bitcoin and awaiting its potential to uplift the broader market.
