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.
I Didn't know that until now,i just realized that yes your right it can be a tool for money laundering. They can just Purchase Bitcoin anywhere and them use dummy accounts to cover up their true motives.