Bitcoin has built a sterling reputation for producing long term value and reliability. Central banks could use that reputation to push their wealth redistribution, profiteering campaigns by building unreliable, regulated, systems using blockchain technology. One might compare it to ethereum which many believe to be stable and reliable as bitcoin, despite ethereum being far more like a fiat currency which can be printed ad infinitum into hyperinflation.
Blockchain technology may also be more affordable and easier to deploy than traditional electronic banking systems. It could boast higher reliability. There are reasons which make blockchain an attractive design from an engineering and business model standpoint.
It is quite confusing how can a bank like JP Morgan embrace something that is a big threat on their main business. We know that bitcoin's main purpose is to become a currency that can be used in the whole world and people are embracing it because of the fact that it is decentralized and I know that JP Morgan is aware that if they are going to create their own crypto currency it will be a centralized one will is impossible to surpass bitcoin.
What I'm seeing here is that JP Morgan already invested in Bitcoin and they are protecting their investment.