Any business can make you that pot of gold - hawker stall, fashion shop, tuition, and even bubble tea. You just need to be good, maybe have some good marketing skills, and maybe some luck sometimes.

But from my interaction with many people, they only talk about ideas and never are committed enough to execute the ideas wholeheartedly.

Watch this video:
- Startups - Cal Tech Talk - YouTube

(There's another one by Guy Kawasaki on a similar theme, but I can't find the link.)