bitcoin can help poor countries in collecting donations. because all what you need is an address and everyone from all over the world can send a donation in a matter of second. it also works fine in remittance because of the low fees comparing with WU
fees are lower with Western Union, but still high in countries that are very poor. some cents seem low to you, but this might be a days work in some poor country. what are you taking about ? remittance money are always sent from developed countries by a family member who wants to support his family. so instead of losing 10% of the money or more as fees for WU, with btc the tx can be sent with less than 2 cents as fees. there is no comparison
