The whole cryptocurrency thing might be a good investment for the short run - or the very, very long run - like maybe 50 years or something. In the mean time, it takes actual money to actually buy the stuff - no?
Since I was a kid people have prepped, expecting a bank/country/world/etc. take over by the enemies and the shedding of blood in the streets, the end of civilization, the end of the world, nuclear war, martial law or whatever other Y2K like calamity arises.
Agreeing with Last Tradhican, if such a thing ever happens, people will be killing each other over a loaf of bread or a piece of meat, cryptocurrencies or gold bars, they will be as worthless as dirt.