if someone within the united states is simply buying or selling too much cryptocurrency, how would the fbi or law enforcement track them down assuming that they were involved in illegal activities?????? would it be the wallets that would be traced if they were using monero or something else other than bitcoin??????? what would grab law enforcements attention in this case, would it be the wallets or simply the amounts of buying and selling of the amounts being too much??? what would bring the fbi´s attention here even though the actual hacking took place like lets say in africa or the middle east????