However, you need to apply wisdom when taking such steps of selling a property to invest in bitcoin, make sure the property you are selling off you don't need it (a property you can afford to lose) because there is a risk in bitcoin investment the embedded risk of volatility shouldn't be neglected.
Lastly, whatever property you have decided you must sell off, you could always sell divide the money, use part of the money realized to invest in bitcoin stead of using all of it, and then using the other amount remaining to buy another of that property elsewhere for a lower rate.
Now this is what I mean: assuming you sold your piece of landform $20k, you use $10-13k to invest in bitcoin and the remaining $7k to buy another land somewhere at a cheap rate. Surely, with years the value of that land will always appreciate so you still have a land (only that it's at a different location) while you invest in bitcoin stead of using (risking) all the money at ones.
Just my two cents.
I have seen people especially in African countries who sell their landed properties just to travel to Western countries. It really worked for some people that they became rich and came back home to buy such other properties. But to others it didn't work for them, whereby they have to return home and become homeless because they already sold all their landed properties before traveling. I believe in diversification of investment, so it is not nice to put all your eggs in one basket. The advice is op is purely valid.