Wow, but the current supply is in there, maybe those miners or whatever they are still have their bitcoins on their wallet, so it is not making any difference because their balance is still going up day by day.
The max supply would be at 21million forever, and it would not change. When someone die, the balance will be in there forever, there is no way to change that, and it does not affect the market.
Maybe there are less bitcoins moving around, but they are still holding them in there, but nobody knows what really happened to those wallets, maybe they are locked