The present high volatility has nothing to do with bitcoin itself.
Actually, in some country that suffered hyperinflation, the devaluation was much bigger, and we talk about "real" money.
In fact, with bitcoin may be you lose, but may be you are lucky and the next morning it will have a +20% overnight!
You can bet that with fiat money this will never happen!
Btw, in the future may be bitcoin will become more stable, but even in this case it will be very difficult to get completely rid of paper money.
But you know, everything is possible, so may be in short time all of us will have a QRcode tattooed somewhere, or just a chip underskin...
Scaring, but very possible.
I personally do not believe the cash will be replaced by whatever the crypto, although I hope to be mistaken.
The crypto are more to be a value reserve, as are gold or stock markets.
Why do you think so? Cryptocurrency has all the preconditions to replace fiat money.
Really? Would you like to receive your salary in BTC and find the next morning it just suffered a devaluation of 20% overnight?
Whether we like it or not, fiat will keep playing a major role in our lives due to it's stability.
Cryptos are becoming more and more attractive has commodities to invest in instead of leaving the money in the bank.
But I don't see how I can pay my groceries with crypto unstable has it is.