When I joined this market I realized one thing, btc and the predecessors have some very big disadvantages that the amount of coin is very few tens of millions to several billion. In order to popularize and provide enough coin for the world economy we need coin that has total supply of trillions of coin. Another problem is the price is high, how popular it is to each person when its price is hundreds of dollars to thousands of dollars. btc and coin are gradually losing their contribution to global economic transactions