1. Hold the bitcoin you have.
2. do not easily believe in news that will want to drop bitcoin.
3. telling everyone about the bright future of bitcoin.
maybe this won't be too influential, but at least it helps bitcoin.
I support your first two points but about the third point I am not so sure, believe me I have tried to convince people about bitcoin and how it's going to change the world and yet people do not want to listen, I have come to the point in which I'm tired of doing it and that is why I gave up, people are going to adopt bitcoin when they are ready regardless of what you do to try to influence them.