^^^ With 8 billion people on Earth, that's (on average) 262500 satoshi's per person. Plenty enough to do business with.
if everyone had accepted bitcoin, I think the price would rise significantly, and it is possible that 1 satoshi could approach $1. Yes, even though it's just a raw thought, we are talking about Bitcoin which has high potential. However, we can see this when everyone accepts bitcoin. Well, it's a good thing to have bitcoin nowadays, especially if we have it in large enough quantities.