If anything goes wrong, and you are renters, you have much less invested and you can easily walk away. If you are an owner and lease your land many problems can come up and the civil courts are of little help, especially to foreigners.
This is something you should plan for because it can happen anywhere. Unless you are a citizen in the country you are residing in you are always a guest and can be deported or forced to leave for other reasons. These UK citizens chose to leave as you know. They could have chosen to stay. Your choice.
What I am saying is there is no difference in the way they are treated for tax purposes when managed the way you have described. I did not say they were equal investments in terms of risk, volatility and investment strategy, just that they were both vehicles that can be used as inflation hedges and/or long-term investments.
Fine, but most people I talk to that are cult fans of digital currencies are using it like cash looking to makes a few bucks in their everyday currency accounts. What you are describing is no different than buying a share of stock. Both can be a hedge against inflation or a long-term investment. Nothing new there.