There's an interesting thread on Quora titled 'What does it feel like to be a self-made millionaire under the age of 25?' http://www.quora.com/Becoming-a-Millionaire/What-does-it-fee...

As you will read through it, terms like insecurity, worry, surprise on unchanged happiness levels would be quite common among the answers.

I have been thinking a lot about investments and have concluded that my main criteria is minimum management. If an investment requires active maintenance and management, it's not for me (unless I'm doing it for charity). This excludes many common investments such real estate and stocks. With others (say fixed deposits, metals, etc.) the post-tax returns are less than inflation so it may not be wise. Right now I have decided to invest mostly in mutual funds.

I'm okay with the risk because the biggest asset I have is myself. The insecurity about future never leaves us, but as long as I believe that I would be employable in future, I can always jump back.

EDIT: added ?share=1 to the URL. Thanks Casseres.