My Uncle/Auntie sold their house when prices sky rocketed in Melbourne for crazy money....1 year later, they are priced out of a house in the same or similar location. Historically, I have sold more than my share of 7's only to regret it and constantly look for another one. Selling now, for me, would mean by the time you find another, you may be priced out at the current rate.
For me...if I can afford it, I will always own one, not as a investment...for joy.