In my opinion, BTC is not a traditional currency like gold and silver because it does not have any use value, so it is not a credit currency. It's basically just one use, money laundering tool. The tool explains why bitcoin prices are spread across the country and abroad. Domestic money is changed into bitcoins and then physical transportation to overseas exchange for foreign currency escapes regulation and the cost of money laundering is lower than before, and the risk is low.
Did you know that bitcoin transactions is traceable, and KYC on every exchanges site will make all transactions become very very transparent. And did you know that even if Bitcoin is not exist, people will always find ways to do money laundering. If you use bitcoin to do money laundering then the risk can be bigger because law enforcement can track the transaction.