The central bank has shortcomings and bitcoin is able to cover up. But the lack of Bitcoin which always turns into a weakness to be determined as a currency. So this is only part of themany country that has endorsed it as a means of payment. However, I believe that the blockchain technology owned by bitcoin is able to provide a future solution.

Yes of course the working in crypto exchang get paid this is obtained from the transaction fee for each exchange. For fiat or crypto I don't know.