Thats why you should contribute into decentralization of bitcoin holder by holding bitcoin yourself or maybe your friends.
So that there's less bitcoin in the hands of whales to manipulate although I know it can be futile, but at least i'm holding some.
But since you're talking about event that might occur until block reward become zero, I think we still got plenty of time left.
Buying Bitcoin at a low price and selling it after a long period of time will be quite profitable but it should only be for yourself and your family. We should not trust friends because Bitcoin is at a very high level at the moment. Therefore someone can cheat their friend out of greed.
You should look for something better than this because it is not really that useful because it has a lot of risk that Bitcoin will not be lost from your hand and you also know how high its value is.
These things won't end anytime soon unless another new Blockchain come along that makes us want to calmly dive into it and use it to get the most out of it.