But I wonder how bitcoin will perform when the pandemic is over.
Well, this pandemic is one of the key factor for Bitcoin's adaption and popularity. With the demand of having a cashless transaction, Bitcoin has been one of the many options to pay for some goods and services without actually handing over a physical currency. But, what's good about having Bitcoin? Well because people are actually treating it as a store of value rather than spending it like a "real" currency. This is one of the reason some big businesses and rich individuals are shifting to Bitcoin than keeping their dollars that continues to depreciate because of the pandemic.
Therefore, I believe this pandemic just introduced Bitcoin to those people who aren't totally aware of the usage and future of this technology. Thus, Btc will become even more popular.