Or another question!
Is there a place to collect the lost bitcoins (I mean the private keys is lost,and the bitcoin in that special address stay there forever)

However it is interesting for all bitcoiners.
I have 10 lost ,I lost them in 2011.the price in that year is less than $1😄
And you?I do not think that it is possible to pinpoint which wallets have lost private keys unless you specifically know them.
As far as I know, there are thousands of BTCs which are currently lost in circulation or inside some wallets that belong to either deceased persons who have failed to share their private keys; or to some people who completely forgotten about them. Though this may be the case, I do believe that this is what makes the economy of BTC- its limited resource and scarce supply makes it more valuable the more it is being mined.
This is also the reason on why many anticipate the upcoming fork this 2024. With this being said, I do recommend that you always keep your private key to yourself or inside a vault in the event of an accident to your life or to your belongings.