It's still too early to discuss and believe that btc will replace the us dollar bill.
As it stands, after all these years, it's impossible to buy a coffee with btc, due to confirmation times.
Not to mention than the average Joe never heard of btc.
Also privacy cannot be accomplished with btc. This is an early misconception and uneducated people believes that.
There are a lot to be done to make this coin perfect, we might enjoy the ride till it goes mainstream.