Why would you worry about that? The less bitcoins in circulation the higher the price. < based on a reduction in supply > This is why most people are saying the <1 000 000> Satoshi coins should stay out of circulation, because it will have a huge impact on the supply, if it was dumped on the market.

A lot of bitcoins are lost every year and this just increase the scarcity of the coins. ^smile^

That is not a problem but a strength of the coin.
It matters not because in the future it can be decided to simply divide every bitcoin to 20 decimal or more so it will simply increase the value of every bitcoin.

Yes, that has already happened and it will keep happening but the good news is that those who keep their bitcoins and don’t forget their keys will have more value. If there is the same demand or more and there are less btc, price goes up.

There will be no problem for the use of bitcoin tough, because even if, like 15 million bitcoins get lost, satoshis will be used. Bitcoins could be subdivided even more so there would be enough bitcoin currency to be used by millions and millions of people around the world.

Its like you're in real life and you die with your wallet. And no one touched your pockets or anything. You'll have your money out of circulation and that there woould nobody be able to get them for you. If there is a way the user might hve to expressly detail it somewhere so that another can have access on it.

To get access to Bitcoins you need to know corresponding private keys, and usually they are stored in special wallet files or printed on paper wallet. So it really depends on how that person was storing them - the easiest case if there is a paper wallet or a flash drive with unencrypted wallet file or a piece of paper with a wallet seed written on it. All this allows to easily recover bitcoins. But usually wallet file in encrypted, so you would have to crack it, which will depend on how strong the password was. But in the future (20-30 years from now), the AES cypher might be easily broken, so recovering bitcoins from wallet files will become viable. But aside from that, there's no methods to recover bitcoins, because there's no central authority to appeal to. And also, it's not a problem, because bitcoin can be split into 100 000 000 units, so there's no shortage of money supply.

Yes of course it will disappear, no ways to recover and not be counted, but it will not give a big effect for bitcoin circulation unless all bitcoin users around the world lose their memories  - could not it all happen ? - I hope it will never happen.

The problem of the owner's death is even noticed in official bitcoin website. Pretty sure someone will make a service to help with that.
Untill that time every lost coin just add price to the other ones.

all activities must have the risk of putting bitcoin in an offline wallet, if the use of death or loss of memory ascertained bitcoin owned will disappear from market circulation, and that also makes bitcoin increasingly rare existence and cause bitcoin prices are increasingly high as well because the more rare .

There is so many incidents like this, one losing the key or the only way to gain access for their wallet and you can see some in blockchain who has so much bitcoin then suddenly stop and there is no any transaction that follows. They even search for it some wallet that has so much bitcoin then will sell it for money, even though it cannot be access unless you has something to remember.