The cure to COVID-19 would not spark interest in bitcoin but rather on pharmaceutical companies behind the concoction/vaccine. For months we have been telling here in this very forum that it's not only bitcoin that is affected by the pandemic but rather the whole economic scene of the world. Also, even if the world gets COVID-free before 2020 ends, most of the countries would be busy rebuilding their fragile economies and repaying debts that they used to combat the virus and by giving aid to the public. Someone has to pay that debt, and it's certain that the repairs for the economy would focus more on the domestic and international affairs and bitcoin would just sit in the corner because that is the least of the priorities of people by then.
Will not spark the bitcoins interest since bitcoin is not been advertise to used when pandemic hit us badly but the recovery of the economy will bring an impact to all together with the bitcoins since many the old crypto users will hold back again nor fill their wallets to take another venture in cryptocurrencies. And this will be separate on rebuilding the economy since it's government job to do those things, but for individual citizen's for sure they will start to find profits from their online ventures and businesses.
Do you think these are related things? I doubt it.
Not related, but possibly it can bring impact when everyone is stable.