Let's say that bitcoin becomes mainstream like we all hope it will, and many years from now a large portion of bitcoins have been lost due to lost computers or destroyed servers. If there are only 5 or 10 Million bitcoin that still exist is there any way there could be more bitcoin produced, or is it absolutely built into the bitcoin architecture that the 21 Million number cannot be tampered with? Would it simply be easier just to make due with the bitcoin still left in circulation and let the market determine the new value of a bitcoin?