Gold is available, but it's stopped because of the Covid-19. Investors look at BTC

The problem is physical, not about the availability. Because of the Covid-19 pandemic, many nations have imposed restrictions on logistic, on transports and even, obviously, on the foundries workers, that currently are not working. In this situations gold price in UK went so much down than the USA prices.

The main problem for retailers consists in transport: selling gold is not theoretically possible, but in practice is very difficult. They are so much worried about try to send a shipment because it could be stopped. 

Another problem is about people economic anxiety: the crisis due to condi-19 is taking people to invest in gold as a safe haven asset and the question is if there is enough gold to keep the contracts closed on Comex

so what? BTC can offer a good solution

Yes, Bitcoin can be the ideal solution for gold investors. It's available 24/7 and it's a hard asset, but most important its on a global online market, with regard to the gold, of which the market is very local