To be honest, it depends on the current situation. In the event that a certain fiat currency is to go down, then yeah Bitcoin would be a safe place to invest your money in. But when this kind of event where food, medicine, and necessary supplies are more important then money, then fiat money would be your best bet. The decline of Bitcoin might be because of the current event where supplies and medicine are more important so it is pretty logical that everything is going down this month.