I don't think there will be a burst of the student loan bubble, ever. I think to cause a bubble to pop, with anything, there needs to be a sudden change where people suddenly can't cover the repayments. Dentists and doctors will always be able to cover their student loan payments. They graduate university, are ambitious and eager to work hard and earn money and dont really have much other debt, they generally haven't bought a house yet, don't have kids yet, have minimal expenses as they have been living like students. So when they graduate, if something suddenly changed, like a significant drop in income from a recession, they are able to weather that drop in income. The student loan issue is a slow burn, dentists graduate and then suddenly realise they aren't in a great financial situation and have to work harder and longer and delay things like getting married, buying a house and having kids, but i don't think they will ever default on their loans, which is what is needed for the bubble to pop.