When interest rates are this low, you would be stupid not to have a mortgage, imo..
That is what some think, but what are you going to do when that changes? By buying a house you are setting yourself to pay for it for decades, are you sure the same conditions we have now are going to remain for the next decade? Because Im not, Avoid debt like the plague, getting into debt for so long seems a terrible idea to me, pay the house with cash if you can.
Fortunately in my country fixed rate mortgages are the norm. Keeping a chunk of my money/bitcoin and buying a house with a mortgage is thus a much better strategy in the long run.
I will build the house so it should keep its value (and most likely increase), I will build it in concrete so it's not gonna deteriorate, and where I am real estate prices have only gone up for the last 20 years. Even at the worst of the economic downturn they only stagnated, never decreased.
Finally, a house also has a usage value. What I will be paying in mortgage I will not be paying in rent. If I want to install a mining rig I will not have to ask for anybody's permission. Put it in a shed outside ? No problem.