Coinbase has diversified its revenue streams beyond transactions through subscriptions, blockchain rewards, and interest income, but it faces stiff competition from larger exchanges like Binance, which may limit its appeal. The company generates a significant portion of its trading revenue from altcoins, with 55% of transactional revenue in Q1 coming from non-Bitcoin, non-Ethereum trades, and 43% of trading volume excluding these assets plus USDT. There is a risk that the cryptocurrency market could consolidate into a few dominant coins, reducing speculative altcoin trading and potentially diminishing the spreads and fees Coinbase earns, impacting its revenue.