Just like Bitcoin was launched by satoshi in 2008-09 as new financial system, somebody in future may come up with another idea and we all start following that and abandon bitcoin along with other crypto. That's just one possibility for 2140, we all wont be here 2140 but lets post with hope that this forum will be there in 2140.
There are 120 more years. Maybe what you say is true, but I think bitcoin with blockchain teknology will be the creator of the history of the financial industry of the future. Digital money is the future of money