'why would the average person want to move to and adopt a currency when majority of power is in very few hands ?
The reason that "majority of power is in very few hands" is that the majority of people don't want it - simple as that.
If they wanted it they could have it.
Do you notice something ? When things are cheap, people don't want them so they don't invest in them. When they are expensive they DO want them and so they invest.
Right now, a significant chunk of the Dash coin supply costs peanuts (relatively speaking). Only a few people are investing (relative to the world economy). When it becomes very expensive (e.g. if it gets a market cap of billions), far more people will invest.
Thats just the way the work works. Blame the people not the asset.