Exactly, and the difference of trying to do FRB with bitcoin or gold is that the new currency being created isn't the original currency. In the case of USD, fo

Exactly, and the difference of trying to do FRB with bitcoin or gold is that the new currency being created isn't the original currency. In the case of USD, for example, a USD created by a bank is indistinguishable from one you deposited on the bank. You could say that being able to double spend in certain conditions is a feature of modern currencies, and largely necessary for a stable economy, which is impossible under bitcoin.