If it was created for the family.. I'm pretty sure that family is going to live off Bitcoin for some decades! It was a very smart idea and I guess he owns a big part of the BTC Rich List. I just cannot believe that some random person was able to code this amazing currency that didn't fail in ANY way!
Its not created to benefit his family and business alone, if so they could have got a patent for the technology or the innovation. That might be true that Satoshi is the one who holds the largest volume of bitcoin that's been mined.
Satoshi might not even aware that his invention can change the world. It is just like invention of bulb and Wheel which changed the world. Next 50 years and you will see more usefulness and benefit of bitcoins and more world adopting this.
He created it and I do not think it was just a random idea that he planned.. I guess Bitcoin was the result of years of work, not just a few days because there are no issues with it, it's just perfectly created. He should've known the potential of it since he released it online, because Bitcoin can be used for so many things. I just think about it and I already get dozens of situations and ideas where Bitcoin can be used. I think Satoshi was a person who wanted freedom and anonymity. It doesn't mean he is a criminal, he probably wanted to only stay away from the control.