What do we think of a time that may come when the fate of human survival will depend only on using cryptocurrency for buying and selling, because mankind may soon find Fiat currency is obsolete or of no value in their current environment perhaps due to world earth crisis or pandemic or war .
Your opinion is valid!
It's not impossible. Coming from rocks, and seashells, to metals, precious metals, now with coins and fiat money. Cryptos are even called nowadays as 'smart money' so, there is a possibility that in the future many are heavily reliant to crypto for purchases. But, I don't think that most of the countries are going to let go with their currencies, they might go digital wholly but that's still going to be reliant to the government's standard and not with crypto nor Bitcoin. However, we're starting to see the impact that Bitcoin is doing in the fintech.