If we want crypto currency to be a currency we have to keep spending right? But at the same time it's something worth keeping too since I do the same with my fiat in bank for more than 2years without touching it. Is it possible to say that Bitcoin in every wallets for the past 2years without moving are considered lost due to death or lost recovery keys? It's pretty hard to believe that anyone won't come back for their Bitcoin after 2years with no activities on the wallet.
We can't consider a bitcoin in a wallet to be a lost one all because it has been in the wallet untouched or unattended to for two years or more, just like the fiat money deposited for savings in like manner an owner of bitcoin can imply such choice with his asset keeping his keys safe and secure, for anyone can have such plans so it's not wise to think it's owner might have been deceased and as to why the asset has been untouched for such a long period. In 10 cases it could be 2 losses but how then do you know for sure!
But it will be confirmed later on if the owner really died, like 68 years passed, and still there are no transactions on that address, then it could be concluded at that time that it's lost, and it is not like the bank, where if you are a relative you can still get the funds, but in bitcoin you can't if you don't have the private keys. That is why it is better to tell someone about it so that whatever happens, they can still access it.