We are wondering what will happen to bitcoin if its all done, i mean totally mined..?perhape it just circulating wherein those mined will not be lost wherein it will keep floating in the space and still working how the way it works, especially those lost wallet and satoshi wallet that becomes so popular in the internet because of the amount of it, so perhaps for that reason bitcoin will not last. Just saying. 
Bitcoin will be rare in the market because only some people or companies will have a large bitcoin. Maybe in that time, the price can be at the very highest price that we never think because bitcoin has become rare. It is still too far from this and we do not even know whether we are still alive to see that will happen in the future. If so, we can witness the bitcoin history that we are part of the early adopters. But I never think much about that instead just think about what I can do now before it is too late.