If clearly bitcoin is not showing any progress in the world income but it is clear that most of the people have told that bitcoin is providing a good income source to many of the jobless people and now they are enjoying the happy life while they have invested further so it will not wrong that they have own their trading platforms and many new ICO has been started by them once they were very new to it and now they are able to develop the crypto so it has bring much change.
How you can say that bitcoin is not contribute in world's income ?
Do you know how many people are actually working as a freelancer and earning bitcoin or ETH as an income for months.
one thing even students earning from trading and bounty campaigns and they earns huge money from it.
Per capita income has increases certainly you can't say that crypto is really helpful for those who want to earn money online.