Stock daytrading, but expect to lose for several years before you begin to win. It is skilled work, so don't get advice about it from those who believe it's not possible. It even is true that it's not possible for most people.
A plus is that this gives enough free time and energy during the late afternoon and evening hours to do interesting tech work.
You're obviously being sarcastic. The goal is not to win big - the goal is a steady income, perhaps even a compounding one. Wanting to win big is above my skill grade, and I get it.
A plus is that this gives enough free time and energy during the late afternoon and evening hours to do interesting tech work.