What should be my "business model"?

I like open source and at the same time i wanna make money.

I'm planning to sell my key system and stuff, and also sell my support to setup the server or whatever.

im not sure if it should be open source or not

here is my plan

A. make it open source, more people are gonna use it (hopefully) and im gonna get much more recognition, but i will get less money

B. make it closed source, less people are gonna use it (idk) and im gonna get much more money (if it even succeds)

to make it worst, i can only do bitcoin lol

decide for me pls, i dont really care about the money though, its not like i pay for bills, im only 13