That would be chaos if it happens. There should be a central regulator for such issues as national currency imho
Another brainwashed who think life is impossible without permission from the centralized govt!
Without revolution - no. Global elite will do everything to protect their power (money is a power, you know it).
If need they even start WW3.
Global elite may have large investments in cryptocurrencies.
Also they are smart enough not make Earth inviable after WW3.