will you reopen them again when the crisis is over?
That will depend on the market situation. We will notify our users once we have any information on the matter.
Ok, what market situation are you waiting for this?
First and foremost BTC will have to increase in price and then we will go from there.
IF BTC increases significantly in price it will be likely that difficulty does too, and you'll be back to square one.
Costs are the problem surely, electricity especially.