Well if trading i were able to make around 2 btc montly atleast i would be very happy to left my current work.Even knowing that bitcoin is unstable,and can easy drop its price,but i dont believe it will decrease,it will get bigger year over year being worth around 2000 dollars ,atleast are my hopes bitcoin reach that value in around 25 years or more.Why would i work to others if i can survive and have all the things with some lower effort and work.
"If I were able".
You can do that possibly if the price move frequently but it doesn't. Also you can do that if you have larger funds to move even at small margin of price.
Still it's not an assurance that you can make decent earnings if you will use your trading funds to support your general financial purposes. In life there aren't just basic needs. We have misc, emergency, urgent and a so called pop up needs if you got my point.
And keep in mind that we are talking of "living" here. It's a long term and not a joke one.