This is just more evidence that exchanges are bad for cryptocoin. What crypto needs to be healthy is direct user to user transactions, with absolutely nothing in between. That was the original vision with bitcoin. Everything layered on top and in between the transactions fundamentally results in harming adoption.
P2P Bitcoin with no exchanges or ACH-based fiat offramps will reduce the number of coin holders to probably what it was in 2011. That in turn will reduce the credibility of the currency and overall market liquidity as there are so few holders that would be willing to accept it as a medium of exchange.
This is playing out right now in Russia, which accepts INR for oil exports, in a bid to limit the dollar's influence.The problem this has created is that Russian banks are flush with Indian rupees that aren't accepted by other vendors. Everyone takes dollars and euros and yen, but the INR isn't considered as portable.