In theory traceability is not a problem if you can maintain a complete anonymity of your online persona - which in practice most people can't.
Just like drug cartels know how to collect and store anonymous money but find it very hard to use it. Every time you try to buy something expensive or normal financial assets, you have to explain where the money is from or you may lose it.
Try to buy a house with anonymous crypto and find out.
It still would make a lot of sense for regular folks who prefer their online habits not to be tracked by corporations and sold around.