I managed a number of websites and earn from the advertising. A portion of the money earned in fiat are invested back into bitcoin, if that fits into your definition of growing your bitcoin. Also have been thinking of making another separate website that focuses specifically on crypto and then placing ads networks that pays in bitcoin
Not a bad idea.
A way to go about it is to generate income in the "real world."
Getting a job may be a way to go. Earn money in fiat and buy BTC.
Either that or be lucky enough to work for an employer who will pay you in BTC. It gives a tingly feeling like you are looking into the future.