Can you buy a house with BTC? Yes! All you need is a buyer with coins and a seller that will accept them. The value of the transaction is as of the date of the contract, when the coins change hands.
Now that Bitcoin was slowly regaining its price from its continuous dump that happened at the very beginning of this year, we can now considerably state that yes, we can now even buy a house using Bitcoin in which is just possible if and only if the matter will be favorable into your side wherein the seller will accept Bitcoin as a term of payment to even buy a house of your own because even Bitcoin was already widely popularized nowadays, still many people do not consider or still do not accept Bitcoin as a currency for terms of payment so it will be a big problem for you seeking for a seller that will accept Bitcoin or you can do exchange it first to your national currency to make it possible.