At my brief time at college, my group of friends used to party a lot so we knew alot of people who partied too. Started doing our own parties in hired apartments with our own DJs. Contacted our university to ask if we could host a student party. Went well. Done it once a month for a couple months but we weren't allowed to make profit as it was on university property (some bullshyt).
Got in contact with a small local club if they wanted to host the event their as we had built up a small following and had relationships with some good DJs. Moved there and started making money. Talked to a bigger venue and asked if they would host a bigger student event where we would organize coaches from other colleges and uni's to come to the event, hiring people at those colleges to sell the tickets (Students cant turn down partying, nor can they turn down a job lol). They was with it.
Dropped out and did that for 2 years. Made good money. Blew alot of money living life like a rap-star (C-List rapper maybe lol) and the money slowed down real quick lol but now me and our friends are looking at relaunching in a slightly different avenue. Just getting the money together.
Seeing how we done that in what was a couple years and making alot of money I realized I couldn't work a job again, I'd rather be broke and unemployed and just plan something that I could show somebody who got money. I have a couple other things I do but I regard them as hustles.
You aint got to reinvent the wheel to make money. Just take something small, sell it, reinvest and scale it up.