it will be an alternative option
it might kill paypal and western union though
I agree with this. If people had any sense Cryptos should fatally wound PP & WU, but how long they take to actually die is another question. Cryptos might kill fiat currencies eventually, but it's a long way off. Cryptos need to become so easy to use and store that our grandparents can use them with ease.
Ding ding ding! WE HAVE A WINNER!
Once no one uses any sort of physical unit for exchange (physical dollars, euros, etc.) Government doesn't need to print anything, they simply dictate who has what. --With clicks on a computer. They don't like your business? "Sorry your shut down. You can't buy, you can't trade. You can't live."
This further sends currency on a GLOBAL SCALE to a down-word and finally rapid crash.
Allowing Government to have high involvement/control in the many medians of exchange gives them too much extra taxing power on the people.
Leaders on a global scale would have to unite coming upon agreements in efforts to keep traditional and old-style medians for exchange alive.
Remember using a physical dollar/euro even directly is still a (traditional and potentially untraceable) median for exchange.
Just using traditional currency and holding it allows the value to deteriorate over time ever more giving government and bank business more power on a rapid rate.
Why are you encouraged to hoard/save something that loses value over time?