I really dont understand the logic of being OK with paying double for a house, just because the buyer can sell it for the same amount (or higher) afterwards.
I could purchase a 150m2 house with my salary a decade ago. Now I could find a 75m2 house that would be too expensive for me. I dont care about being able to sell the house for more money afterwards, it doesn't matter, because I have to live somewhere anyways. So any profits gained will (probably) be factored into the purchase price of the next house I'm buying.