币界网报道：Bitcoin and Ethereum continue to dominate institutional portfolios, maintaining their positions as the top crypto assets held by over 50% of asset managers regardless of market cycles, according to recent industry analysis. Despite price volatility, these two cryptocurrencies remain the preferred choices for professional investors seeking exposure to digital assets. The data reveals a consistent allocation pattern where Bitcoin typically represents the larger share due to its perceived store-of-value properties, while Ethereum's smart contract functionality secures its secondary position. This trend persists across both bull and bear markets, suggesting long-term confidence in these assets' fundamentals. Portfolio compositions show minor fluctuations during extreme market conditions, but the core holdings remain stable. Analysts attribute this resilience to Bitcoin's established reputation as "digital gold" and Ethereum's central role in decentralized finance and Web3 applications. The report also notes that alternative cryptocurrencies collectively account for less than 20% of typical institutional crypto allocations, with most managers avoiding excessive diversification beyond the two market leaders. This concentration reflects institutional risk management approaches that prioritize liquidity and market capitalization over speculative bets on smaller projects. The findings underscore how traditional portfolio construction principles are being applied to crypto assets, with emphasis on proven networks with substantial developer activity and real-world use cases. Market observers highlight that this institutional behavior contrasts with retail investor tendencies to chase higher-risk altcoins during market upswings.