By getting greedy and treating FTX user funds as capital to deploy in the prop trading firm.
Knowing when to stop is genius.
Meanwhile, some how magic internet money (abracadabra.money), with people bitching about their bad debt on chain for months is still solvent, while ftx is dumpsterfire...
So perhaps not surprisingly, Uniswap - which is a preeminent DeFi app - now has deeper liquidity on many important trading pairs than the largest CEXes: