Re: From year 2099 till 2140 only one bitcoin will be mined...
From 2099 till 2140 (when the last satoshis will be mined) there will only be one bitcoin mined.
And in that year, I was already in the ground, whether the earth is still there or not. 
By the way, with the last coin to mine, with the limited supply only, what will be the price? Of course it will increase up highly, however, what's about the value? Well, this is too far to think because we also don't know whether it will still last or not.
No one could predict exactly what will happen after 120 years. But you can imagine where bitcoin price was 10 years back, and now imagine where it could go after 120 years.
Well, it may be 12 times higher than the highest increase so far, probably. Or on the contrary, it may have no value because the technology has changed. It is so difficult to predict those very long time later. I wonder how all miners in the world online mine the last BTC, will it influence the mining tools? What will happen to the mining equipment? Or, there may be other ways in how Bitcoin will be used or utilized in the real use case.