i applaud your desire to use this money to help others. However, I'd encourage you to at least keep a portion of it. You don't know what twists and turns your life might take, and you don't want to find yourself at retirement age realizing that you can't afford to. Or what if an accident and medical costs deplete your savings? Wouldn't you rather survive debt free? Maybe you'll get lucky and end up not needing it then when you die you can give it to charities, and if you invest it somehow, you'll have used his money to make money and donate even more than you received to deserving charities.

He's dead, he can't buy your love at this point. Use his money however you'd like to live your best life in defiance of what he tried to do to you when you were younger.