I' ll take bitcoin as an example.
Is it mandatory that the value of all bitcoins is equal to the value of the world economy?
Can this value be archived before all the bitcoins are mined?
When I buy bitcoin someone will take my dollars.
So how can we technically replace all dollars with the bitcoins?
In the end will there always be someone with only dollars in their pockets or am i wrong?
The price of all the Fiats are not related to its values, not even an inch of it.
This will not be possible since the cryptocurrencies are decentralized, you can monitor its price but it is impossible for you to manipulate it. And the government that doesn't that. They wanted to have profits, in order for the economy to grow.