Provided the land you are selling is yours and there is none that will come later and put pressure on you for selling the land. To me it is the best approach to raise money instead of going to borrow money to invest in bitcoin I will do the same thing if I had land to sell and raise money. Provided that you don't have intention of developing the land in the nearest future, and there is no pressure on you in the place you are living currently. I don't see any reason for keeping lands while the land can give you a reasonable amount to invest in bitcoin. There will always lands to buy when you make enough money. For me any asset that's not providing any immediate use can be disposed and raise money for investment.