Anyone who earns a lot through bitcoin can help others particularly the street children in underdeveloped countries. I would love to organize a volunteer group to help and provide food and clothes to children who are deprived of the basic necessities such as food and shelter.
I feel if some of us who are already made or at least have some few stuffs going for us, can at least start from somewhere. I have always loved to lay note on the importance of giving back to the society and not just getting rich from your holding and living a large life. Sure, we may owe no one anything, but at least, it is always a good thing to help those who are really in dire need even if the governments would not.
If those people who have many or huge amount of bitcoin donate to those country have poor people or kids. bitcoin can be used to help people and give the opportunity to develop a economy, so it will probably help them in a simple way with bitcoin and any digital currencies.
Yeah, the wealth amassed from bitcoin can be used. The OP stated how bitcoin can help, but the fact remains that, bitcoin can only be a tool for some of us who are early adopters to get wealthy from being an asset asides being a currency, and from here, we can all try our best to put some few things together as philanthropists in our own community to give some of these kids the best in education.