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.
If global elite can't control cryptocurrencies as a dollar, euro and gold they don't need it as a large investments instrument.
So if crypt really will be danger for power of GE than they will find a way to close it.
And if WW3 start it won't harm global elite only simple people.