Trading you can start with little money, but to mine you will need more investment.
Also if the energy is cheap where you live, mining is a great choice, as soon as it's all set up, it gets easier.
I agree, if you want to do mining you should have big capital to buy those things you Need for mining but if you are doing trading you can start in small amount but also expect the fact that you earn is also small profit but at least you can start on small amount.