The sheer volume of speculation and scam ICO's is the main opposition and it creates doubt in new comers about viability for future large scale integration. This is similar to the communications protocol for the Internet, which uses several layers including an Internet layer for routing data to the appropriate destination, and an application layer for defining the protocols used to exchange the data. ADA is the popular cryptocurrency which is attracted by many company, investor and corporations (contract), also there several benefit and valuable program inside.