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.
Even if selling personal property and investing the money in Bitcoin doesn't make them lose the money, it's still not a recommended thing to do because you should only invest money that you have as a spare for investments that you make for your future. If someone is trying to make a career out of cryptocurrency trading and trying to put together a capital for it, that's a different thing but even for that, you are not supposed to sell important things and you need them in your life. You can't sell your house and start a business with the money, you will have nowhere to live in case the business doesn't go the way you might have expected.
So, even though Bitcoin investments generally bring profit eventually if the investor is patient, it doesn't mean a person should invest all that they have in it to try and maximize their profits because that's the wrong thing to do. Be moderate with your investment decisions because investments are never guaranteed to bring profits at expected times.