The idea is that rather than hold your wealth in Bitcoin, you would continue to hold it in your local fiat, and only use Bitcoin for the payment protocol. Imag

The idea is that rather than hold your wealth in Bitcoin, you would continue to hold it in your local fiat, and only use Bitcoin for the payment protocol. Imagine if Paypal operated in "PPBUX" instead of local currency. Because of the large volume and high speed of transactions, PPBUX <-> USD would not be a very important number. You would only hold PPBUX for the few minutes required to make the transaction, during which it's pretty unlikely to move against you.