#1 What are the Homeless supposed to to with a obscure cryptocurrency?
#2 Who is supposed to oversee the donation process?
#3 Nobody here is interested in charity.
#1 - the donations would be converted to fiat and donated to charity as already explained.
#2 - I explained this already. The donation address would track the donations, and the website would show where the funds are going
#3 - Don't know if I should laugh or cry at this comment. So let's say people aren't interested in charity because they are ruled by greed (I doubt everyone is this warped). However, the +greed angle is that the positive publicity of the "charity" would put a positive light on cryptocurrency. Thereby increasing the public's interest in the *crypto currencies, and overall increasing value of all coins. Net result everyone wins, even the greedy ones.