TL;DR
- BTC and ETH now account for a record 58.8% of non-stablecoin portfolios, Bitcoin at 31%, and Ethereum at 8.5%, upending traditional “balanced” crypto allocations.
- Bitcoin’s share jumped from 25.4% to 30.95% in six months, driven by growing institutional flows into spot-BTC ETFs and custody solutions.
- Ethereum’s rebound (3.9%→8.5%), XRP’s rise to ~5.5%, and Solana’s drop to 1.76% underscore altcoin volatility amid shifting investor confidence.
As digital-asset adoption accelerates, investors are leaning harder into the two biggest cryptocurrencies. New data shows that BTC and ETH together now account for 58.8% of non-stablecoin holdings, an all-time high for concentration within diversified crypto baskets. With Bitcoin forming roughly one-third of total crypto allocations and Ethereum mounting a powerful rebound, traditional notions of “balanced” crypto portfolios are being rewritten.
Bitcoin Dominates One-Third of Holdings
By May 2025, Bitcoin’s share of average investor portfolios climbed to 30.95%, up from 25.4% just six months earlier. This surge underscores Bitcoin’s enduring appeal as a store of value and digital gold proxy.
For every three coins an investor holds, one is now BTC, a ratio that highlights growing institutional comfort with Bitcoin’s liquidity and market depth. As large players pour more funds into spot Bitcoin ETFs and custody solutions, BTC’s weight in model portfolios shows no signs of easing.
ETH Rebound Bolsters Portfolio Concentration
Ethereum has made a strong comeback, increasing its portfolio share from a low of 3.89% in April to almost 11% at its peak in November 2024, and then settling around 8.5% in May. That surge helped push combined BTC + ETH concentration to nearly 59%. In practical terms, for each dollar invested in ETH, investors usually possess around four dollars in BTC. The rebound reflects renewed confidence in Ethereum’s upgrade roadmap, expanding DeFi activity, and the growing number of ETH-based institutional products.
Emerging Players: XRP Climbs, SOL Sags
Beyond the blue chips, XRP overtook Solana in November 2024 to become the third-largest non-stablecoin crypto by allocation. XRP now captures roughly 5.5% of portfolios as the market braces for potential SEC approval of spot XRP ETFs.
In the meantime, Solana’s market share has dropped by almost 35% since October, now standing at 1.76% due to worries about network outages and changing developer interest. These shifts show that while BTC and ETH dominate, second-tier assets can still make meaningful moves.
The mounting concentration in Bitcoin and Ethereum raises fresh questions about risk management. High exposure to the top two coins amplifies the upside in bull markets but can magnify drawdowns if broad-market sentiment sours.
