Cryptocurrency exchanges that list altcoins are on a 'forever hamster wheel' of launching memecoins.Bitcoin-only institution River Financial CEO, Alex Leishman, warns of the short-term speculation focus of multi-asset trading platforms.Altcoins have historically been more volatile than Bitcoin but offering them alongside Bitcoin has been lucrative for exchanges and brokers.The memecoin market cap has slumped almost 49% since the beginning of 2025.