No, you can't equate selling a landed property and selling gold, because they are off different value. Yes it's fine to sell some part of your gold to buy Bitcoin, but selling off a landed property seems unwise in my own opinion because even in our society today, their are some people that even though they are very poor, they will never sell their land for anything else, because land is of higher value in our society today than gold and Bitcoin, because it's the only asset that can't be lost for ever even though their is fire incident or any other disaster, though some people might have a different opinion but I still refuse to see it as a logical thing to do, because land are even more difficult to get in a developed area than Bitcoin and gold.
I think it depends on how many plots of land one have before thinking of whether to sell and buy or not but aside this I don't think it is advisable to sell land to buy Bitcoin because Bitcoin is not something one can get enough of it at a time, one ought to be accumulating it little by little so how much do you think a plot we give one that he or she will be investing..., the person will definitely use some to settle one or two problem.
Real investors don't sell land to invest in Bitcoin unless selling of land is what they do for a living perhaps a Real investor hustle and get a stable source of income that he or she can be using to buy Bitcoin not to sell a land, I don't think I can sell my land to invest in Bitcoin unless I have more than 5 plots of land and funny enough someone who has more 5 plots of land shouldn't or is not suppose to have a financial problem to the point he will have to sell before investing in Bitcoin.
There are certain conditions which I might term it a good decision to sell land and diversify into other assets, bitcoin precisely. let us take a scenario:
If I have 10 plots of land and I am not developing any of them, nor using them for agricultural purposes, Possibly I have 5 plots in a certain area that is experiencing rapid infrastructural development like an airport being built there or a school faculty or trade center being brought down there, giving the lands a possibility of rapid appreciation, I wouldn't touch them. Then I have some other 5 plots of land in a remote village with no rapid development coming soon.
I would probably sell 3 plots out of the 5 in the remote village instead of leaving all stagnant and use the funds to increase my DCAing amounts into bitcoin. That way I'm diversifying into an asset with more profit potentials, instead of leaving all my plots of land in the remote area with no appreciation on my investment in view, and if later there is an appreciation potential in that region, I still have two plots of land there left to give me considerable profits.
I believe this is a smart investment practice of transferring a seemingly less performing asset into a more performing one like bitcoin.