Sure, but none of those things are taking into consideration that there is only a few entry/exit points for fiat currencies, that is needed to actually buy thin

Sure, but none of those things are taking into consideration that there is only a few entry/exit points for fiat currencies, that is needed to actually buy things in the real world. The trick with cryptocurrency (not cryptography) is that everything is always tracked. Creating addresses (not wallets) to spread out value you had in one address? That's tracked, logged and stored forever. Using a distributed exchange protocol? All those transactions are also tracked, logged and stored forever. The only way you can avoid being tracked is by using centralized exchanges, and then you're only protected by the owner/employees of that business. So no, cryptocurrency doesn't change anything here. In fact it makes it easier to track, as I said before. If you think it makes it harder, please look into how the technology you're talking about now actually works.