i am sure bitcoin will be more rise and shine in 20 years and its price will be more increase and i hope we can be use our bitcoin in local shops for direct shopping from bitcoin and we will be able to use bitcoin as physical shape.
you can see the development of bitcoin at 7 this year, is simply amazing. let alone in the next 20 years would be 2 times more successful than it is today. and certainly bitcoin is far more acceptable at the time, it was the most importantBut what really amazes is that this is just the beginning, Bitcoin is a stage in the history of economics that will change the way people see money.