not only in bitcoin (crypto) in the real world, there are many people who do it without bitcoin, how they do it all, all depends on people who use bitcoin are used for good or evil, indeed for now it's bitcoin is easier for crime but over time all transactions can be seen where they send their bitcoin, this is what the security forces in the countries of the world have to do, enter the world of bitcoin and can know crypto transactions of their citizens, in my opinion if this happens bitcoin will not be dangerous, and bitcoin can accepted in the world. everything has developed now don't you influence people not to use bitcoin if you have got a lot of profits here boy