I wouldn't have time to think about it twice, not even to flip a coin, but obviously I would go and save the kid. If we think about life as of a downhill slope thing, then the kid should be saved because he's standing higher. The purpose of the life is not just to live it as long as we can. Old sick and dying man won't do anything good to us. Not even his money. REMEMBER!!! Wealth does not come from money or gold itself. Wealth comes from work! We can turn everything we have into gold and we can be in Midas's position, but we have to get our lazy asses to work. Giving money for free makes things worse. Look at EU countries. They got the money from EU and look how terrible they ended up.
Let the kid live.