I think the case is made by Bruce that the whole concept of decentralised trust is an oxymoron.
In the end you do trust the code, a computer running the code or some currency exchange.
In the end you do trust the code, a computer running the code or some currency exchange.
There's both centralized and decentralized exchanges available.
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