I don't think buying a house would be a good idea. Not to mention, you have 100% of your net worth in bitcoin?!?! Why would you do that?! (at least the way you said it sounded like that, if I'm mistaken then I'm sorry)
Buying a house from bitcoin profit is not a bad idea, if you earn huge amount and can afford to buy or build a house why not right. There is a possibility that we can afford all we want here in bitcoin just continue to believed in bitcoin do not let put negative thought in your mind for bitcoin always think positive you life would be better than before.