CoinGecko Report: Bitcoin Dominates Retail Portfolios — 20.4% Built Portfolios Around BTC, 28% Hold BTC with Small Altcoins

CoinGecko‘s September analysis highlights persistent Bitcoin dominance across retail cryptocurrency portfolios, with nearly half of retail investors citing BTC as their primary asset. The report shows 20.4% of participants have built portfolios almost entirely around Bitcoin, while the single most prevalent allocation—28.0%—pairs a core Bitcoin position with a modest altcoin sleeve, reflecting a preference to remain Bitcoin-denominated yet retain optionality. About a quarter of market participants place greater emphasis on altcoins; 17.3% report a balanced split between BTC and altcoins, 10.2% allocate the majority to altcoins with a small Bitcoin stake, and 15.9% exclude Bitcoin altogether. These distribution patterns underscore diverse risk appetites and distinct portfolio construction strategies among retail market participants.