Poverty will remain as long as people judge others by how much wealth they have accumulated, and as long as there are societies with social stratification.
No, it will not end world poverty because how about the people without knowledge bitcoin.I think it will lesser the world poverty of the people updated the new generation but not the end of world poverty.
How can it do it? People, who drag their poor life cannot deal with Bitcoins, and the profits that blockchain can bring to others is nothing to them. Yes, some of us will pay less fees and be able to make cheap faster transactions, buy stuff for crypto, but it does not have any connection with the problem of poverty.