Nahh, people still get away with stolen funds using bitcoins.It's still possible to hide your trace of your coins using privacy tools like coinjoin or mixers. The idea is that people of high status like Trump, usually have a lot of eyes on them, not that their name was written in their wallet address to specify they own it, but literally they made certain announcements when they had bought their coins, making it's not private but a public agenda.
Criminals won't be so stupid to do such, they are very much aware of the implications that follows so, they would literally use those privacy tools to hide tracks.. fact is, they give good mixing services bad reputations like we have seen alot on the forum, not that they get caught..
Because of the reason you gave about the mixer(hiding the traces of coins), that is the main reason why some countries governments are against mixers, not in support of them, because through mixers, terrorism can be funded and other illegal activities can be carried out without traces. And those involved won't be made known.
It wouldn't sound nice in a government hearing that a transaction run in Bitcoin they want to find out about is untraceable to them