Yes but internet connections require a functioning power grid to function. And radio can be jammed or intercepted. There are exceptions to everything and it would depend on the situation I guess. Also I want to make it clear that I’m not against digital assets obviously I use both #bitcoin and #monero I just think having all your assets digital is a bad move, the same can be said for all physical assets as well. The don’t put all your eggs in one basket mentality I suppose.