In case of an economic collapse the stock market is the first thing that crashes and then other domino falls. Thus to have a safer side a person should always hedge some of his money in crypto in order to have rainy day funds, as mostly it is seen that the crypto market used to rise when the stock market fall. Also when there was change in laws in China about capitalism in end of 2017 the Chinese stock market wasn't performing well, but guess what the bitcoin price rose tremendously back then reaching the ATH and that too in only a couple of months.
Yea, because when an economic collapse happens and a lot more people lose their jobs and don't have much to eat the best thing for them to do is to invest in a speculative asset. In the first place, we don't even know how bitcoin will do in an economic collapse. It's still very likely for bitcoin to go down along with everything.