What happens to btc generations from now?

As current holders die and people don't have access to their wallets, coins lost, etc. Last I saw, the current estimate is that 2-4m btc has been lost and is gone forever. Will there not come a time when all the btc has been mined and the available quantity will only be able to decline? I'm sure for a bit it will increase value, but what about even beyond that? Would the supply just dwindle until people are holding onto a few Satoshis as just a collectible relic of the past instead of a currency?