Don’t forget, they can fall too:
In the last rapid run up in the 90s, it fell back to just before the acceleration and took over a decade.
If the same pattern applies, we could see a 30% drop over the next decade or so.
A 30% drop would wipe out your equity and may require a large cash call on top.
In the worst case if you no longer meet criteria for mortgage (or at next renewal) you can be forced to pay off the loan completely or be forced to sell at a loss in the weak market.