"The people who do have money have lots of it."
Yes, they do, which is why they can afford to buy places everywhere and not really have to use them--they are PURELY for wealth preservation. They don't even care if they drop 30% in value (which they are not), that is a good deal compared to other futures they are looking at.
Also, like I said, million isn't what it used to be. People with the money pay CASH for the properties--they are not like the chumps who get some sort of mortgage. The "price" somebody will pay for a mortgage? Do some work on an online mortgage calculator--
$1M purchase price
$800k mortgage, 30-yr @ 5%, w/1.25% property tax & 0.5% PMI:
IF only minimum payments of $5,336 are made each month for 30 years, the purchaser ends up paying $1,921,046.27 for that $1M property. Yes, the value may have risen during that 30 years, it may even have doubled to the $2M one would need to get out of it to get back what one paid.
OTOH the person with money to pay cash up front, has a completely different outlook on things.
There are people making money off this pricing, too. Consider those who acquire by inheritance, yet cannot afford the maintenance/upkeep/taxes, due to the high assessed value. They can sell and make a pot of money that they would never otherwise see. Yes they will have to dispose of a family asset, but whatever--many times if they are in that situation they MUST, in the USA, just to pay the estate tax bill.
Also, properties in some areas of DC are going up, a lot, in value. The streets in DC are "paved with gold", but it's a fool's gold--a lot of DC and surrounding areas SUCK. The housing stock SUCKS. Neighborhoods SUCK. But, the same is true in many places in the world. Overpaid government hacks with defined benefits pensions can afford it, they don't care. Many are buying up older places as tear-down's and redeveloping. Local jurisdictions are very concerned about turning single-family areas into duplexes and multi-family occupancy. Lots of monster homes going up in outlying places like Bethesda, Cabin John, etc.
The only reason to be in DC, unless it has nostalgic value for you because you grew up there, is to make money working for/off the government. The place is a swamp, unlike other places where the wealthy park their money--which is why in DC it is many locals who still own, off money they made off the backs of you and I--rather than internationals looking for wealth preservation vehicles, as in, for instance, Manhattan. The best thing about DC is its proximity to Manhattan, lol (yes the National is good and Dupont Circle can be fun if you are gay, but that's about it)(oh, Air&Space if you are 6)