Buy lots of cheap bitcoin, and start mining.
What about if bitcoin didn't exist for some really odd reason?
If Bitcoin would die tomorrow then i would be so mad because I still have some Bitcoin left that can be traded and if it dies then it will not be possible anymore.
But I would have no choice but to accept it because there is nothing that I can do.
Anything is possible in crypto world, it may die in future and if it dies then without thinking much we need to move on and choose the best option available at that point.