FX is the largest market in the world. It's about 30x global GDP.

If BTC can take 1% of the FX market its value would be $1.5M, each. As the price of btc rises it becomes less volatile, which makes it more attractive for large transactions. Btc transactions settle without active third party involvement or approval.

Btc, in particular, should be very attractive for International settlements in the future. That's why the OECD wants a piece.