Adoption and usage is the important thing but what about people that heard about bitcoin? I'd say even 20 out 100 heard about it. But don't use it.
Okay , let me work on this to emphasize my point,
There are a million people in city A.
On day 1 , Nakamoto tell 9 friends about it , making it 10 adopters. ( 9 total new people )
On day 2 , each friend tells 9 friends about it , making 100 adopters ( 90 total new people )
On day 3 , each friend tells 9 friends about it , making 1,000 adopters. ( 900 total new people )
.....
On day 6 , each friend tells 9 friends about it , making 1,000,000 adopters. (900,000 total new people)
Now , at day 3 , one friend decides to estimate their progress.
He sees that it has been three days since it started.
He says that 1000/1000,000 = 0.1% of people know about Bitcoin.
They estimate that it will take 3 * 100/0.1 = 3000 more days for the entire city to know about Bitcoin , when in reality , it will take only 3 more days.
However , in a realistic scenario , this will take a bit longer than 3 days , as by day 6 , a large proportion of the people each friend tells will have already heard of Bitcoin from someone else.
Getting back to my point , the growth and rate of new members entering into Bitcoin is increasing exponentially.
Price charts are shown in logarithmic scales , in order to make them readable.
My prediction is based on the exponential growth of Bitcoin and asserts that we are halfway there.
The prediction cannot be deemed accurate , because it is just a guess at best , but it is still more accurate than all the guesses of 1 so far.
BE CONFIDENT IN BITCOIN ! WE HAVE COVERED FAR MORE GROUND THAN THE "1" YOU SAY