That is true! I didn't think about that. But with the supply now and people learning fron their mistakes i think it will take a while before that happens. Once that happens maybe we'll see different scenarios. One will be that Bitcoin will lose value and we'll look at a different coin or we'll use a more sophisticated verification to retrieve lost coins.
What do you mean by disappearing bitcoin? Do you want to say that if the price drops more and more it will disappear one day? I think differently than you. I think that the price of bitcoin will not drop than $6000 and with the passage of time it will increase again. I am not saying about any bump in the price but when the market cap increase the price will also increase.