Safe is the point. At least in the US, property taxes are substantially cheaper than anything you could do with liquidity, plus you can tap into the value partially or wholly without actually incuring much risk, or even taking that long. Owning property allows you to have collateral for loans and other financial investments which have larger yields, but require something up front. It is entirely possible to get a loan against a house for an investment, then pay it off with the yield of a previous investment so you don’t have interest accruing. As long as you are savvy and intelligent with the investments, it is reasonably sustainable, especially if you are profiting off the property anyway. Who cares about an extra loan payment if you aren’t the one paying it.