This week - in 1987 - the ASX fell 25 per cent IN A DAY. Just now the local share market is going gangbusters: In fact, it is testing its all- time valuation peak. But here's the thing: The market will crash again - we just don't know when this will happen or what might trigger the downturn. What was it like to sit through a 25 per cent drop in a matter of hours and what can we learn from it as investors? Alex Moffatt of Joseph Palmer and Sons joins wealth editor James Kirby in this episode. ------ In today's show, we cover: Lessons from the great crash of 1987 Why markets overheat and how to protect yourself Is the scandal at MinRes a sign of things to come  NextDC - Why this value investor thinks it too hot to handle See omnystudio.com/listener for privacy information.