Jobs and Careers in the United States of America: Will there be a lot of unemployed college dropouts after the tech bubble bursts?

I think this question focuses on the wrong issue. The people dropping out of college to start companies presumably have some level of talent; if we are currently in a startup bubble of sorts and it deflates at some point, I think these people will face largely the same job market situation college graduates will (e.g., salaries drop, maybe some level of unemployment). The only semi-plausible scenario I can think of where tech companies decide, “OK, hiring’s changing, we’re not going to hire entrepreneurial dropout-types anymore but we’re going to keep hiring college graduates” is if a lot of new companies pop up to work on, e.g. artificial intelligence problems, and need to hire a lot of people with deep expertise in certain areas. I think tech companies need a lot more implementors, etc. than they do researchers actually guiding technologies, so I still don’t really see that scenario playing out.

No, first of all many entrepreneurs are trying to revolutionize college education. Quora could be counted as one. Top universities are trying to make their courses available to everyone so I have a high hope that college enrollment would stay the same if not getting a little cheaper if free courses are available to the mass with credits. Second, college is a still a safe route to follow. It's good to get to know your friends and it's good to build connection with those people who you could eventually found a company with. The more people you know, the better off you would be even when you're unemployed because that network will definitely help. Third, what tech bubbles? Is this the one in early 2000s? If so, yes many companies have felt along with their ambitious college students but keep in mind if they got the gut to start a company on their own, even when they failed they would find some way to get employed.