My question is, are we still alive in 2140? I think we are discussing too far, and it is impossible to answer at this time. Indeed, the target of Bitcoin is long term. Every day the Bitcoin miner continues to grow. I think that in less than 50 years Bitcoin will run out in the mine. Bitcoin stock is very little.
In the context of prices it is very dependent on the world's rulers. At present the ruler of the world is Satoshi Nakamoto, even though we don't know him. He was present not to be remembered by anyone, with his program that was so great.
It is possible that the next decades of technological developments will become increasingly sophisticated. And a new hero will be born. If he agrees with Bitcoin, then Bitcoin will survive. If not, they will develop new technology and leave Bitcoin or Blockchain technology.
We will not life again at that time but it looks like you are very wrong about the context of bitcoin depend in the world's ruler. You can argue that through use the bitcoin technical analysis because bitcoin is having limited supply and we can argue this will be very expensive like a diamond. Gold is not a comparison for bitcoin at that time but the diamont will. Tech can't be erased and remember this.