All of them ; governments , businesses , individuals... It has banks worried, because cryptocurrency eliminates the need for their services. Since they don't have to pass through multiple hands, transactions take place much more quickly. It also has caused concern because it's become harder to regulate financial activity, which has especially interesting implications on the international level.
there is clearly a difference in the way the facility is managed between crypto and banks, obviously it cannot be compared because there is a separate market share.
crypto can run without the needs of the bank is clear, but banks can also run by themselves because of the needs of people for transactions that have been developed.
in some countries crypto is still not recognized as a legitimate transaction and can be guaranteed by the state, of course this is still a difficulty for the development of crypto.
Even though the state can actually take tax from every transaction on crypto. it is also difficult for the state to control the transaction if there is money laundering using the crypto facility.
because the state must be the last bastion to be able to control, but crypto is very difficult to control.