For me it is trading BTC because in trading you can earn big. But before you earn you should learn how to trade because if you do not have the knowledge in trading you will not earn big you might loose some of your BTC. You should not afraid in doing trading. In mining you have to invest big because you will buy computer parts for mining and if you also don't have yhe knowledge you will also loose some of your BTC in trading and mining you should have understand and know how to do it.