I have seen bounty hunter doing well, I have also seen people who do not participate in bounty and are making it well with trading alone, but I have never seen anyone around me being involved in mining, I learnt mining is more risky and cannot just be done alone, and if you even attempt it probably with your android, you may end up wasting your time and not even making it as the traders and hunters. It tend to take a massive effort to be successful in mining, you need good electricity,good mining wallet, computer with good capacity, and some other gadgets. Considering all this, which of all the participation do you see as least demanding and easiest?
Well, if you didn't participate in the earlier mining years of bitcoin, you will be really having a hard time. As time progresses, mining is getting harder and harder. If you want to earn bitcoin, invest in some good altcoins, if it has a good price you could trade them to bitcoin but take note, timing is important. If you have the money to start you could invest in bitcoin and just keep on holding.