simply because even if they are not investing in own country's company, they still are spending spare money in it
Not everyone could get some profit from trading , so even if someone trade regularly during the quarantine doesnt mean that he gets some profit. It could be the other way around and he lost some money
Hoarding Some other currencies like USD , Euro or other currency doesnt mean you will be able to liquidify it anytime you want. There are alot of people that think like that so when it is time to liquidify everything then I expect your local money exchanger might not be able to take on all request ( different stuff if you hoard cryptocurrency lol )