It would be heaven on earth at any point in time that even 10% of world population would adopt Bitcoin as everyone in possession of some coins is assured to be rich. Presently there are about 7 billion people occupying planet earth, 10% of which would be 700,000,000 and Bitcoin by nature have an upper limit of 21 million coins, let do a little maths: on the average each person within that 10% would be allotted 21,000,000/700,000,000 = 0.03 Btc.
I think we should start praying for such a time when even 10% of world population would be using Bitcoin, to come real quick, because what it all translates to is some huge demand for very limited supply of coins. Imagine the huge scarcity that would create in the community, the price of Bitcoin would simply shoot to the moon. I think we should renew our efforts to bring more and more people into the community because it stands to do us all much good.
It is possible everything that you say,the more the users the highest are the demands.Remember that not all the time the value is stable,so for us today who learned it already knew it must also do our part,like introduce it to those who are interested and willing to experience what bitcoin has to offer to everyone.That time that would be a gives a very good outcome for us now who already using it.