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.
It is possible one can hold bitcoin on their wallet for years without touching it. Have you not heard of dead wallets ressurrecting after years of inactivity? Of lately, a wallet holding about 420 bitcoin was activated after a long time holding. What you have asked is possible and feasible. I would want to correct an impression from you, not all dormant wallet holding bitcoin for years are assumed inactive. Some of the wallets owners are still very much alive but they have that as investment for a long time and are still very much aware of the market trends. I think some of them are well to do in the sense that they have other investment business they are running or if possible, they are well paid in their jobs so therefore see no need always putting eyes on their bitcoin investment as they have enough for living.
All I am trying to point out is that it does not necessarily means that inactive wallets are dormant as a result of dimise of their owners but rather they wallet can be seen as a long time bitcoin investment.