An "education bubble" has been discussed on quite a few sites in the last year - the problem is that if it bursts, what will that mean? No one that I have seen

An "education bubble" has been discussed on quite a few sites in the last year - the problem is that if it bursts, what will that mean? No one that I have seen has presented any ideas about what a "bursting" education "bubble" will look like in real world terms. So, if it can't burst, is it really a bubble? Or is it just excessive price increases, that may keep rising or that may stop without any collapse?