As much as I prefer monero to btc there is no such thing as tainted btc. People will still give you the same amount of money for it. If there was really tainted bitcoin you could just send some to those whale wallets with 1k+ bitcoin and now all those bitcoin are tainted? Give me a break lol
Sorry but this is not how it works. If a whale address receives a tainted UTXO, is that UTXO and not the others that is tainted. But good luck selling it without any hidrance.