You could borrow against your BTC to pay for the house, or at least a down payment. You can also do the same for the mortgage payments. But ideally if you have mortgage payments, you have income you can use to pay. And ideally, the price of BTC goes up enough over time that paying back the loan is "free" (it could also go the other way and you get liquidated if you cannot maintain your collateral ratio, so be careful with that). There is also the option of selling BTC for fiat to buy the house / make the down payment, which likely has tax implications and of course you lose exposure to BTC price movements. Good luck and happy house hunting!

Find someone willing to sell there house for bitcoin? You could approach any house owner selling and say you will pay x but it has to be in bitcoin can also have it sent to you in 10 minutes instead of a week or more

You don't buy a house. That's stupid. You rent it if you really need it to live into. You will remember my words.

houses are shitcoins

Yes. In Miami there have been a few houses that have gone on the market for BTC before. In fact a couple of them were discounted if you paid in BTC slightly the price in USD was higher since the seller wanted BTC.

Use strike’s loan product (if you have fiat/sat flow). Cross your fingers and hope you don’t get liquidated. Pay your 14% APR and be happy

You make fiat debt

You sell the bitcoin pay the taxes qualify for a smaller house after you've been shanked by the tax man and then you still need to pay property tax and other property carrying costs while you watch that 1 Bitcoin continue to sky rocket in value