Definitely COVID19 effect on all global market prices, including BTC&altcoin prices. But as we can see volume is pretty high now, so from other side all last events can bring more users, mass adoption and push the prices higher.
indeed there is a decline in the overall global market. almost all countries and economic sectors have decreased due to this virus. but seeing what happens to the crypto market seems to be stronger. it might also be because of the support of halving bitcoin but maybe there will be a better moment for this market to grow bigger.