I was dealing with the same issue last month and found a direct solution. You can now convert usdt to btc https://paybis.com/swap-usdt-trc20-to-btc/ in a simple 3-step process without touching fiat. Just enter the amount, provide your BTC wallet address, and send your USDT to the given address. The rate locks in at the start so you’re protected from fluctuations. It works with any wallet, including hardware ones like Ledger, and the swap completes within minutes. Much cleaner than the old sell/buy method.