Many trades on exchanges happen against stablecoins instead of USD directly. All trades on DeFi that go from 'fiat' to crypto go through stablecoins. If you w

Many trades on exchanges happen against stablecoins instead of USD directly. All trades on DeFi that go from 'fiat' to crypto go through stablecoins. If you want a cut of the fees paid by speculators then you are probably interested in stablecoins because that's how you market make in these markets.