Eluc on Nostr: That's exactly the issue, and if you do smart contract, you get liquidated the second ...
That's exactly the issue, and if you do smart contract, you get liquidated the second you are undercollaterized, plus you need to use other blockchain, no real bitcoins.
Maybe we can imagine a kind of multisign wallet with miniscript, both party must sign and agree to renew before every year (limitation of miniscript, you cannot make it longer yet), then we could imagine the signature scheme change for 2 of 3, with the third one being a trust external third party, like a lawyer, then after again some time additional backup thirs party could be added to prevent anyone from losing access in case one party + third party loose their keys.
But until we can do that, you are right, spending your BTC might be the only way for a large expense like housing.
Maybe we can imagine a kind of multisign wallet with miniscript, both party must sign and agree to renew before every year (limitation of miniscript, you cannot make it longer yet), then we could imagine the signature scheme change for 2 of 3, with the third one being a trust external third party, like a lawyer, then after again some time additional backup thirs party could be added to prevent anyone from losing access in case one party + third party loose their keys.
But until we can do that, you are right, spending your BTC might be the only way for a large expense like housing.