middle class in developed countries aren't going to pay $6,000 for 1/10th of something, or $600 for 1/100th of something.
Lots of people these days are buying 20 bucks worth of bitcoin and are receiving 35510 of something (with current exchange rate) on regular basis. In other words your statement is based on your personal imagination.
Overall adoption grade: B-
On what scale and based on what? Your flawed assumptions?
What would be A+ and what would be F? If bitcoin made the poor, rich you would consider it A+? That makes no sense since bitcoin was not meant to produce profit for anyone.