Poverty, legal identity etc. are major concerns in the third-world countries. Data says one-third of children in the world still lack legal identity (sourced from Informationweek). Poverty and lack of food still kill thousands of people. Can Blockchain put an end to all this?
I think not. Blockchain can't help eliminate the basic problems in the world. I think Bitcoin only helps with billing issues. Make sure that Bitcoin payments are faster and more convenient