Have you ever heard of a hacker wallet being specifically marked as a hacker wallet? If you've really heard of it then avoid accepting payments from those wallets or you'd better not make transactions with them ^{[but it's hard to track them down].} But since we can't tell which coin is called dirty coin, then I can say that it is clean. Every coin you buy on a centralized exchange seems safe from dirty trade lines, exchanges and governments can't catch you or freeze your assets just because of that, but maybe the exchange will freeze your assets if it's actually a deposit from a wallet marked as a hacker's wallet.

You have the option of clearing history transactions from your purchased coins by using a mixer, in this case you can increase your privacy in my opinion.