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.
That is true, what is more you can buy cars and everything if you only have a person who can make this transaction possible. In future imagine that even shops could work like that... it would be awesome to see such a situation.
It is great. So you can buy a house with bitcoin, and it's not as hard as you may think. You just need one thing: For the buyer and seller to agree on exchanging bitcoin for the property.