Higher education bubble?

Suppose there is a game with a billion participants. Each participant starts with a (fair) coin. Each round, every participant flips his/her coin. If a person flips a heads, they get a dollar. If a person flips tails, they lose everything. After twenty-five rounds, what happens? Someone will try to write a book explaining how to flip heads twenty-five times in a row.

Enter Peter Thiel, venture capital wunderkind. Thiel predicted the dot-com bust, the housing bubble, and now....the higher education bubble.

Is higher education a bubble? Do employers over-value a college education? Is a college education worth the debt?