I read some old threads about lost Bitcoins ND this question has been on my mind ever since
If the lost Bitcoins were for instance recovered will the price of Bitcoin drop because in theory it would affect the amount of Bitcoin in circulation which will lower it's price . I saw in those threads that lost Bitcoins are considered a donation to the Bitcoin network. so if my theory is correct then we should be happy those Bitcoins were lost.
When talking about lost bitcoins there is a possibility that it cannot be recovered because the habit of losing bitcoins is caused by carelessness and negligence of people in saving seeds or keys to bitcoin storage wallets. Why should people be happy when the bitcoin price drops? If in theory you mean a drop in bitcoin only at the time of purchase and wishing the price of bitcoin to go down it might still look normal, because generally people would try to take advantage of the drop to buy it, so the theory you mean is weak and unprovable.
The supply and demand process plays a much larger role and will remain in effect throughout its journey. When bitcoins are lost because access to wallets is no longer affordable, they can no longer be used forever by anyone. Therefore storing bitcoins in a secure wallet and securing the seeds and keys is also very important.