Some solutions for the 4 million bitcoins I can propose for good use is investing in the future of economical disasters countries such as Venezuela, Zimbabwe, and others.
bitcoin is a currency and a payment system, not "solve-the-world's-problems-system". if you want to help with the situation in other countries then go ahead and donate out of your own pocket and try to help them, why are you trying to put your hand in other people's pocket and use their money to donate?