I can consider with high certainty that most of the gold and fiat currencies are more tainted than Bitcoin will ever be, but it's not easy to track gold origin if you melt it and create new bars.
It is well know facts that dollars are mostly used for criminal activity and most of them are covered by drugs, but I don't know many people are complaining about this.
There is nothing bad in Bitcoin being more ''tainted'' over time, in fact if all bitcoin becomes ''tainted'' there will be no more reason to talk about it, and it's almost impossible to ban it globally now.

This is something unrelated with Bitcoin, there is global trend of crazy regulations, tracking and surveillance everywhere, and problem is that not enough people is complaining about that.

Talk about it, raise awareness about this problem and explain masses how important privacy really is.
Best way for governments to enslave more peopleis to start a new war, so that people can accept changes easier and be more obedient.