To quote myself:
I'd say this is a severe threat to Bitcoin, and I wouldn't be surprised if governments use this because they can't stop Bitcoin in any other way. If people believe Bitcoin is "tainted", they won't accept it anymore. "We" should really inform people not to fall for this.
Nobody would reject a dollar bill because it has previously been used in a crime, despite the fact that 85 to 90% contains traces of cocaine. Claiming Bitcoin isn't fungible is just plain stupid.
This site explains very well what it's all about:
I have gotten bitcoins from eXch for a long time now. And now I am planning to sell those bitcoins. I'm talking about what happened recently with Bybit exchange, about blocking. And I want to know if such bitcoins are blocked by BingX exchange? I want to be sure.