It's the ability to move between USD that allows us to discover the true value of a bitcoin. Quick example - in Argentina currently, the government is desperat

It's the ability to move between USD that allows us to discover the true value of a bitcoin. Quick example - in Argentina currently, the government is desperate to keep foreign currency reserves in USD, so they've banned most means of converting ARS to USD. This has created a dual exchange rate where the official value is 5:1 USD, but the "alternative" rate is 8:1 USD. The difficulty of conversion is causing the value of pesos to fall by nearly 40%. The "true" value of the peso is probably somewhere between those two numbers but the market's ability to discover its true price is being distorted. If a currency as "big" as a member of the G20 ($450 billion GDB) can get massive distortions from closing just some of the easy conversion points, it could destroy bitcoin if the US Government made it difficult to convert into and out of USD. Further, it seems to indicate that BTC would need to be incredibly liquid before converting to USD wouldn't matter that much.