Yeah 10% is a correction which at some point is highly possible, if you measure peak to trough a correction could be more. You just never ever want to be a forced seller.
Moranbah is an example of a market crash.
I don't know how old you are but don't think that way, slogging away at ppor dept is the hardest by far, investments are with other peoples money and if you buy well require little and eventually no contribution by you.