I think buying house with bitcoin is not that practical. Buying real estate with bitcoin is a good thing to do. But you need to convert it with cash in order to buy a house and do not use bitcoin because it is more safe to make transactions using cash and not bitcoin since you need to make it personally and do the deed of sale.
Conversely, buying real estate with bitcoin is much more convenient. You do not need to carry a huge amount of paper money with you and worry about their safety.