More or less the answer is the same answer to the question "How i can earn more dollars?"
This. It's kind of annoying, that almost everyone who finds out about bitcoin has a hard time thinking of it as a real currency.
While I agree, I'd like to play devil's advocate a little: The type of response Gabi gave, while true, is generally rather unhelpful. If I search for nearby businesses with jobs on offer, would I be more likely to get a job paid in bitcoins or pounds? How, specifically, does one search for a job paid in bitcoins?
[I realize BitcoinBarrel has proposed one possible answer to this, but again browsing reddit to find a job is not what I first think of when I want to "Earn more dollars".]