Everything depends on luck...

Well, as much as luck is always part of everything we do, we also have to realize that it is not everything that depends completely on luck and not when it comes to investments most especially. Knowledge of the space you are in will let you know how to handle yourself in that space or not.
If you are relying on luck all the time, which is mostly what a lot of people do by investing in anything they see, you will only realize you are getting soaked in losses over time.
However, you need to learn, you need to be smart, you need to take calculated risks, and you need to put your money where your mouth is. If you by any chance discard all these things, you will realize that luck does not actually have much to take you anywhere.
We must understand that luck is part of our fate. We might have some good days where every bad move would be converted to good one and sometimes it is totally not helping you.