Because of the regulations a crash because of bad debt should be less likely.
The same for overpricing due to unrealistic valuations.
However, I read a while ago that creative bankers had created toxic debt products similar to those that caused the 2008 crash.
And there's always the possibility that people (possibly small time investors) get too optimistic.
Stock price is driven by offer and demand, so too dependent on the market mood.
I think the main question is whether there will be small adjustments or a top of the scale stockquake.