In the digital-age that we are living, Crypto-currencies are the most practical store of value as long as the internet exists. If we are at the point where the internet is no longer and the world is in total chaos, then what good is gold and silver anyway? People will be more worried about food and survival each day. Carrying gold and silver around will do you no good. You can argue that Food is a better store of value than Gold when SHTF.
Well apocalyptic situations aside, the main point of concern is that bitcoin might end up being worthless in the near to mid future. What do you have to say to that?
There are too many uses for bitcoin (and other cryptocurrencies) for it to become worthless. The price might go down a bit, but it won't go worthless. It's here to stay.
The problem with apocalytic scenarios is people assume that the apocalyse will affect the whole planet. But even WW2 didn't really affect the Americas, which meant that both North and South America made a lot of money during the war. If there is a true apocalyse like an asteroid wiping out all life on earth, gold won't be any use either.