For immediate payments and liquidity yes it is useless, if you compare it with gold or diamonds at this point even they would be useless because you don't have a diamond merchant who can buy them from you. But in the longer run networks, internet and electricity will come back live again, so as a store of value you definitely are leaving with something concrete and valuable not just something useless. For the time being you can say it might not help you getting out of that situation.