Unless you’re using a crypto exchange that is a, shall we say, “pretty easy” on KYC protocols, your crypto transactions are still, ultimately, traceable.
Even if you use Monero—which is supposedly one of the harder to track cryptocurrencies available—there are still ways around it.
You have to understand that if somebody truly wants to track you down, they will find a way.
And, the blockchain isn’t actually preventing them from tracking your transactions.
You have to pay close attention to the exchange you use, and as much as possible, use a hardware wallet.