Simple Bitcoin related businesses one can start:

1. Start your own faucet
2. Create a blog about crypto or technology
3. Start a Bitcoin forum Going to be hard because of Bitcointalk. .
4. Start a faucet rotator/list and get profit from referral
5. Buy crypto related domains and sell them off
6. Day trading
6.5. Create a profitable robot to do day trading for you

Just some idea I came up with in 2 minutes. Hope you enjoy. .