Quit college for cycling?

Road racing, and more specifically sprinting.
I dont care about being well known, cycling is a passion not a business, that doesnt mean i wouldnt like to make money out of it however.

I'm passionate about writing, but if I depended on it to put food on the table then I'd be eating rejection letters.

You must think about income and supporting yourself first, and with luck that will help finance your passion, perhaps even allow that passion to eventually support you full time.

If your parents are willing to support you indefinitely then try go pro, if not, stick with learning a trade and riding hard during every free hour of your time. If you are that passionate you can easily find four or five hours a day to train.