It is quite risky to sell immovable assets such as land and property, you have to know what you are doing and you have to enter at a really low price. Don't let the purchases you make cause you to lose even more and end up panicking too much. In fact, it is not really advisable to sell land and property for Bitcoin investment, because the price of land and property will also be higher and you cannot buy it back at the same price. Long-term investments take time and require patience, don't panic about declines and don't sell at a loss.
Every person has different principles in thinking about assets, some are BTC, gold, shares, property, etc. Whatever the choice, the goal is one "profit". Fellow investors must respect each other for the decisions they take. But personally I also follow your advice not to sell property just to invest because this is very risky. Except for those who have a lot of population assets, there's no harm in trying as OP suggested.
Because sometimes as investors you have to make a brave choice, maybe they will become very rich when BTC reaches the new ATH, which we believe is now at that time because we are approaching the BTC halving.