It's definitely true that we can live without bitcoin because not only bitcoin the produced money. But the truly fact is, when we have a bitcoin that is the biggest chance to be a millionaire someday.
Yes, because people who are ordinary and don't know anything about Bitcoin can also survive until death picks them up, but if you want to become a millionaire, then the choice is Bitcoin, because the more we have Bitcoin, the richer we will be in the eyes of society.