A bank is not a single entity, it's made of people converging after reaching consensus
There are a lot of banks, with different interests that usually compete with each other and work under regulations that have been discussed and approved after reaching consensus
There are several different central banks, that work together under regulations discussed and approved because they reached consensus
There are a lot of banks, with different interests that usually compete with each other and work under regulations that have been discussed and approved after reaching consensus
There are several different central banks, that work together under regulations discussed and approved because they reached consensus
The "decentralised" exchange already exists