This is a discussion that had been talked about in many threads that has the same topics and ideas such as "Bitcoin being dirty" and so on. But yeah, the idea also is repetitive whereas it was a fact that calling nor tagging bitcoin as good/bad or clean/dirty is just nonsense. But it doesn't mean that having a bitcoin that was mixed with bitcoins of criminals can make/tag you as a criminal. Remember that there are bitcoin mixers out there such as chipmixer where it blends your crypto with many cryptos that uses mixers as well, and AFAIK those mixers prioritizes user safety hence making such mixing anonymous and private, more likely to be untraceable after.