Earning 1$ per hour is easy, earning 1BTC per hours is difficult.
Earning 1BTC per hour is pretty much damn impossible. That is making 200 dollars an hour. I don't know anyone making that much at the moment. Basically that is a 600,000 dollar a year job. Not saying it is impossible I just don't see people making that much per hour on Bitcoins.
Well, a big job, or a ASIC mine of 500TH/s would earn that much. That is probably not what most people can setup since that would cost easily 150 000$ to startup But its doable if you can invest it.