A great man but some kind of "stupid": He was a very, very rich man but worked to death. I think he could relax and preserve his life more early - to life a little longer.

btw:
"PS: If you want to earn money, buy as much apple stocks as you can tomorrow. They will be on an all time low."

ore vice versa... (Tim Cook isn't tghat smart - the market know that and Apple can fall)