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survival will depend only on using cryptocurrency for buying and selling, because mankind may soon find Fiat currency is obsolete or of no value in their current environment perhaps due to world earth crisis or pandemic or war .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!
I will like to draw to your attention that cryptocurrency was not made to compete with fiat, or it didn't came to dominate our local fiat system. As a matter of fact, fiat has been the oldest medium of buying and selling for thousands of years. It was a medium exchange or rendering of services but then cryptocurrency infact Bitcoin came into existence to prove decentralization. Or makes online exchange to be great , fast easy and effective, but that doesn't still mean that cryptocurrency will be used for everything and fiat will be neglected.