Imagine you live in New Orleans right now.
Bitcoin does you no good.
Credit cards don’t work (regardless of currency).
Gold is of no use.
What you want are durable supplies you can eat, wear, give you shelter, help you repair stuff, first and foremost.
Spending cash in locally accepted currency comes in second place.
In short term survival of the moment, yes of course. But beans and rice, ammo and a generator are a bridge to help you make it back to real life. When there is a collapse of some sort, bitcoin, gold, etc will allow you to buy into the new currency, and reestablish your life.
A person would be a fool to only have bitcoin or gold and think they are prepped. A person would be a fool to think their durable supplies make them prepped either. Bitcoin and gold is not for use DURING the crisis. It is for after the depression, war, or whatever.
To rebuild your life.