“Digital Currency” Recently, Digital Currency is proceeding, but limited to wallets for purchase. To proceed more, digital currency must be applied to assets classes. Then, paper and coins currency can be invalid. If digital currency is applied to assets and used in smartphones, various types of Bonds and Securities are possible. Digital Currency is associated with Personal Information, and it causes fear and intrust to own government for some people. This problem can be solved by fear to lose money. If paper and coins are invalid, people must use digital currency. To proceed Digital Currency, deleting trust for Bitcoin is good way. Bitcoin is used for dark money, and not in control by trustable organizations. Digital Currency by government can compete Bitcoin if the government is trustable. In addition, Bitcoin has several deep security risk by hackers. Roll back is impossible when hackers steal Bitcoin.
2018/3/31. Swift Programming: Good process makes me growing up! Emotion , this is troublesome before doing things… But , these days , I feel self-growth about swift programming. I can ’ t make APP from zero , but I can copy-write & understand other people ’ s source codes. This is great growth for me. I copy-write calculator APP written on the textbook. I can ’ t write it by myself. Maybe it will takes 2-3 months to make some original APPs , it will faster than I expected. I started learning Swift 4 months ago , and it may be 120-160 hours which I spent , Some homepages and books tells it takes 200-300 hours to master Swift. I think it ’ s right , and it is more than 80-120 hours ( maybe 2-3 months ) to make my original APPs. I want to study faster… And I feel that it is no use about regrets which I didn ’ t start quickly. 3 steps for learning Swift! 1 ) Reading iBooks on launch time by iPhone - 8 hours/a month 2 ) Reading textbooks afte