Anyway, either way, this is yet to remain a question and there is no definite development that will point to its way.
But maybe you can say in 20 years from blockchain trechnology and crypto currency will be with us in our daily transactions or not at all.
Take note of this: please don't get offended on what I am going to say.
Basing on topic and question I think that your just a newbie to the situation of the world of crypto which is the era of technology in which it is already with us and some are using it right now for their daily living like us here Filipinos who is now in use of daily transactions of paying bills that is
COINS.PH that we can pay bills:
-Credit card bills
-electric bills
-cable
-water bills
-boardband/internet
-paying bills for goverment related
-tuition fees
Also if you are pointing out of high tech transaction might happen in the future its a big and wonderful yes technology will increase, it will be upgraded or who knows maybe no more paper money.