Every person on the planet has the need and the right to live somewhere.
Unfortunately the way it works today, allow a small fraction of the population to buy more and more houses at the expense of the majority of people who are constantly out bidden and forced to rent, thus fueling this circle. Landlord get richer, buys more houses and so on.
The only way to stop this is taxes! Should not be convenient to buy houses for the sole purpose of renting them amount, especially for foreigners, see Denmark.