Bitcoin have an potential to overtake dollar in future, but at a moment it seems that people will only use bitcoin, as many of people are not aware about bitcoin and people who are comfortable with dollar will continue to use it.
No overtaking is not the right term. If bitcoin will overtake dollar we won't see some nice profit during exchanges. Maybe the best term would be powerful currency over all.
Bitcoin is already going to be popular and many used and that is nice, the only thing is that you never know what the value will be and that is the problem, we just only can wait.
Dollar is being reduced in using and that is logic because everything now is getting more digital.
It's just popular as your thought because you are here in this forum where many users including alts are actively posting. Go to some different places now and mentioned about bitcoin. If you got 50% answer by yes then I will agree to you.