What will be the most commonly USED crypto currency in the future?
Any reason why you did not mentioned Monero, GRIN or Doge? All of them have secured network by emission and can keep transaction fees low. That is not the case with coins you mentioned.
I added Dogecoin as the first. Monero, unfortunately because it's much harder for people in the USA to obtain it. Other nations may follow suit.
I haven't heard of Grin