Basically a lot of people been earning by the help of bitcoin industry , so in my own perspective the biggest contribution to world income , well the demand and the new ideas that bitcoin shown on the world wide. The most influential coin at the entire world, which a lot of people wanting it. And i guess sooner or later the btc will be successfully known or recognize mostly the governments that still thinking bitcoin is scam. And from the word that i said on the starting, is that a lot of people has been earning through bitcoin industry so basically, they're probably using it , i mean using it? , a lot buying their daily needs, like i did. So basically, it's a huge factor and a great source of income. Big thanks to bitcoin though , well long live bitcoin.
i think in bitcoin money will spin, so many bitcoiners get a lot of money from people who need btc. of course, the more people who need it, the bigger nominal will be, so that they will be lucky, because many are suddenly rich