The way legends make money is not mainly from buying and reselling transactions, but from "waiting".
It's not even the waiting that's important but recognizing the true value of what you invest in. When you own something you know is cheap now you feel confident and can wait for a long time.
When you have a piece of land or a house that someone offers you x but you know it's worth 5x you're not going to sell and you won't be bothered by low offers. It's the same with bitcoin. Know the value and you will go far with that knowledge.
That’s the essence of investing, you can’t be certain with its future, yet your faith is deep so you manage to wait for long term until its best value is finally seen. Just like bitcoin, despite of its unpredictable value at the moment that it may drop or pump later on, but still you decide to hold it longer not only because you have faith in it but also because you know for sure that your coins won’t settle for a less value in the end and won’t disappoint you from having high hopes and expectations.