using it in charity and reducing poverty in the word are two different things. the later is impossible with blockchain technology and there is nothing it can do about it. but the former (using in charity) is in fact one of the best ways t hat you can use a decentralized public ledger such as bitcoin.
I think blockchain technology is doing much more to reduce the poverty from the world than the charity. The poverty we are facing is because of the unemployment of people in all the corners of the world and many people do not get any service because of too much competition while blockchain technology has opened up a new world which has a lot of opportunities for all of the world and a major amount of people are getting their earning for working in blockchain technology.