There was massive money to be made from all this if you start a couple of years ago but now it takes a lot longer to farm a single bitcoin even though the price of a bitcoin goes up with every one made.
The idea is simple, as in how they're farmed and how the system works but you just had to have the balls to go through with it. The ideal scenario is that you could plug it in where you work, where i work they wouldn't even noticed the difference in bills at the end of the month but you certainly will if you do it from home.
Like Dave says, it's a pretty fun hobby and if you can make a few p's outa it then fair play. My local pub started dealing in bitcions earlier this year
http://www.theguardian.com/technology/shortcuts/2013/jun/23/britains-first-bitcoin-pub
and there is a bitcoin machine, which is like a cash machine, that has opened up in Vancouver (hmmm i wonder why?)
http://www.wired.com/wiredenterprise/2013/10/robocoin_here/
Also as Dave says, the will be people out there with machines that are made to mine at insane speeds
So Dave, you just mine by using you graphics card? Have you seen the price of some of the mining hardware you can buy? You can pay close to $7,000 and be getting around 400,000 mhash/s! Although there is a cheaper one which is coming out that's only 350 watts and can get around around 600,000 mhash/s. The 400,000 machine is 1000 watts! That's going to show up on your bill lol
http://www.bitcoinx.com/bitcoin-mining-hardware/
But yeah, i love all this stuff