They'd either do this , or if you got all the money created in the mint then you'd get all of the new credit. Also, all the money in the world would be a mix of notes, coins, money in bank accounts (so not actually physical money) and digital money (anything that can be exchanged for real-life money. This could be anything from bit-coins to ranks to blocks on a minecraft server, as these all have value, even if nobody would actually buy them).