Because someone stronger can simply come and took it from you through laws and regulations.
Also some other country can bomb 💣 your country and may destroy your house.
When you have btc you can simply took your it and go away.
Realeste is good imo only when you have enough saved to buy it like a toy and if something happens, you have your saved money and you can move away and forgets about your last toy and get a better one in a new life.
If you are casual like me, then it’s better rental and btcstacking with some view into future.
But if you had a lot to spend and allready have bought a home for you, then some realeste in other countries is hella win win 🥇