I disagree. I only started investing a couple months ago, which is very late in the game, but I still made easy money. As long as Bitcoin keeps going up, then you make something. If it goes down then just hang on to it until it goes back up again.
I agree and one of the things I repeat over and over is that promoting an affiliate link is just helping someone else get richer in exchange for a tiny piece of the pie. You are ultimately promoting THEIR site, not your own.
Having said that, affiliate marketing is still a good starting place...