Ideas are worthless. Unless you find sucker to sign the cheque. Er i mean... Unless you make them happen.
Fact.
I too had the idea of building a catalogue of available coeds at my university, and yet, I am not a billionaire.
(Zuck stole my luck!)
Good News!
There are still opportunities galore in the FinCreep TateSpace: Men covertly filming women at night and profiting from footage - https://www.bbc.com/news/articles/c9wxx97jlveo
"Men: No depth too low"
(In retrospect, I think that author had more respect for historical facts, but he wasn't so adept at writing a page-turner.)