You must have a portion of your wealth in FIAT money. You had to move easily for paying live expense, fees, local taxes.
If you can just have this portion ready to be used and for the rest you use btc... this is the perfect setup.
Of course, its much better that people invest money only when they feel safe for storing in that way. Otherways yoy will not like the experience...
Simply put, do not just invest in bitcoin but in fiat as well. Or find a stable job that pays fiat, but maximize your investment with bitcoin, that way you will accumulate more wealth in less time. Or better yet, once you have massive amount of bitcoin in your portfolio, then open a new investment with other assets. If they all come to prosper, you will definitely enjoy all of it.
As long as bitcoin remains volatile, no one would be brave enough to focus on bitcoin as for their means of survival.