El salvador- A lesson to the rest of the World

What a announcement came down to the country where filled with many criminal activities. Wah! Bitcoin a legal tender. wah wah wah.....the first country in the history to do so. More than 1/4th of the World not having Bank accounts, and looting is going on. Where the innocent people not having bank accounts, if they want some fiat go to high rate lendors.
Loot continues, coruption continues.......etc. etc.

Why not cryptocurrency replace the Fiat?
Why not cryptocurrency replace the traditional fiat exchange?
Why not cryptocurrency stored in the wallets of every person on this beautiful earth?
Why not paperless currency replaced by the Crypto?