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. 
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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.
.
1. Start your own faucet
2. Create a blog about crypto or technology
3.
.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.
.What about starting a forum that caters specifically for altcoins? You can even copy the current system that Bitcointalk is using, like the rankings, trust system and the ability for different businesses to start signature campaigns. I do still think that this forum is still best but the altcoin section needs to be improved. The posters there are mostly spamming and trolling. So maybe it is good to start another altcoin forum and maintain the quality of posts there.