Thank you for the response.
Living with the absolute minimum has given me the view that moving can be quite simple. But that may not translate to anyone, I understand.
Regarding the illiquidity of the house: depending on where the house/flat you might always find a renter. That way moving could be simple, giving you the option to move back. Depending on which city you live in, buying a property could not be that simple, due to the entire process involved and depending on the market. Sometimes owning a property is the only way to stay in a certain neighbourhood, due to ever rising prices.
I guess if you have a stable or predictable cash flow, renting could always be an option. Yet that option is not always available.
But I see the point, that given an arbitrary house and anyone’s arbitrary cash flow, the illiquidity of a property might be a bigger risk than investing in Bitcoin.