They're all over Europe, now, the abandoned towns.
Discussion
Serious question, can you buy castles?
Sure. They're terrible to live in, though. Cold and damp.
Yes. but who needs "just" a castle if you can revive something like this together with your frens?
A true bitcoin citadel
Yes but I was looking more into this already before I had to come to Germany cause of family. The south of Spain is very rural and doesn't give the younger generation a lot of options. You either work at a local bar or your dad's finca or you move. There is some amazing villages one could revive and if you get a Gov grant and tax exclusion, imagine a town for developers, artists, anyone governed by a genuine and transparent town council. Free internet, electricity, water, mesh. You name it, it's all possible and generally Andalusia has more than 320 sunny days per year.
The problem is always distance to doctors.