This is just temporary. It's not like Bitcoin died or anything, it's usage become non-existent or something better than it came up ( and even if it actually did, i'd guess a split or so of investors). Mostly because of the panic currently ongoing around the globe, Bitcoin has dropped down by such a huge amount. A lot of factories have temporarily closed down, a lot of businesses started closing down temporarily as well, people have no source of income (temporarily) and they are in need of money to spend towards supplies (*ahem hoarding ahem*).

Expect that once a vaccine has been made, panic would quickly subside and the market would probably start going up like really quickly. Why? Because the most threatening problem on the eyes of the populace is gone, so they'd probably strat returning to their everyday lives. Once they see the market and it's price, who wouldn't buy it up right?