In the street I live in the capital of the northern province of Fryslân (Frisia) most homes are owned by their inhabitants, but in the past few years we've seen several houses being bought by small-time investors (who already own their own home of course, are financially well on their way, and are looking for ways to save their saving from low interest rates and inflation), who charge renters four times what my fellow homeowners and I pay for mortgage.
You never get to know the renters, because they are really only here for as long as nothing better comes along (like buying a house or social housing), and who can blame them?
Meanwhile maintenance of these houses is minimal, because the market won't really reward proper upkeep at this point; they can always sell the house for an insane price tomorrow.
It's really upsetting to see my younger colleagues stuck renting a flat, while I own my house having even paid of the vast majority of the mortgage simply because I had the luck of buying it in 2013 (a major dip in the market where paying less than the listed price was common).
For the good of society we need to put a stop to this type of speculation on the housing market.