Don't trade, don't gamble, don't roll dice, don't do nothing. Leave those in your wallet and wait patiently that the price goes up. In this way you will have in a safe way (the safest one) not only 2 or 4 but even more bitcoin. It will make time but time don't cost nothing and your bitcoins don't need food.
Holding a successful investment is the easiest way to make btc money, gambling is the riskiest way of making btc money. Faucets and campaigns and other mini jobs are the patient way of making btc money, devs and tech work is the skilled way of making btc money. And then there are scams and bullshit, which would be the worst way to make money because thousands of people call you an asshole and release negative vibes thinking about you