How do you think the economy will be after COVID-19's demise? Will it gradually recover? Or will it stay the same? Will central banks collapse to a point where only people transact with decentralized cryptocurrencies in the free world? Your input will be greatly appreciated.

The state of the economy after the collapse of COVID-19 is still difficult to predict. Of course, it is not easy to return the economy to its original state, there will be a slowdown in economic growth. Even though now many people transact with cryptocurrency, later the central bank will still run as usual.
Yes it would be difficult to assess the current status of every countries' economical status because the government should be disclosing this important information for us to distinguish if there were progression. I believe that banks or offline transaction would still be the mostly used eventually though we are using online means while we are on pandemic.