There are many things to consider if you want to make something the main source of your income, is it relevant? Would it be enough to pay all the bills? Would it last? Some participants in the bitcoin trading looks at it as a hobby but when it generates generous amount of money, they tend to spend more time in doing it.
Bitcoin investment from past to present is still risky because the price could fluctuate to the extremes; the difference now is each unit holds a value of $4500+ compared to how much it costs when it was just starting.
People do different things and engage in a variety of careers to make a living but would bitcoin trading be enough to survive?