When there is a finite amount of something and someone with more money wants it, it makes the price of it for everyone go up to make it so that some people can no longer afford to compete for the resource, making it available for the higher spender.

Same thing with land & property on it, the working class can’t afford to buy housing now, because rich people want to use housing as an investment vehicle.

Food is another

Ultimately it’s the same problem across the board and the only solution is a wealth tax to prevent densely concentrated capital from distorting the market