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.