I know that the dream is to find a way to spend your money on a thing that will make you money and you will never have to work again. However do not forget about inflation as well. As we have survived and living in a very bad economical situation right now, it is a proof that making x amount of money forever will not help you, you also need something that grows higher as well.

So, assuming you had bitcoins that you put aside and could be barely enough for you, with a drop in bitcoin price, or with no increase, you will end up living in a hard life. So if you really want to make a living out of passive income, you should find something that could go up overtime for sure, otherwise you are risking too much. Or, better yet, just get a lot more than you need and save the rest, which is a very difficult thing and not many people will be able to do it of course.