A man would never sell a house if he had nowhere to live. I don't believe that. If he has a house in which he does not live the maintenance of this house is worth the money. Maybe it is really more profitable to buy bitcoin now and after its rise in price to return money for the house or to buy something else.
To me i will also say that it will be a foolish decision to sell your house and car for bitcoin investment, i think that bitcoin investmet is really a risky investment therefore i think that we should only invest such amount of money in bitcoin taht we can easily afford to lose, but selling your house for bitcoin investment i think it is not a wise decision, i will never like to do so.