both of these do have a big risk, but there is a difference between the two. I suggest before you choose one of the mining and trading you should have understood some advantages and advantages of doing so and we know that doing mining is in need of a large initial capital.
In reality both of these is a good option for us to earn. Yet, we badly need to choose when it comes to our priority and needs. But it doesn't require us to chose only one we could deal by both but we need to make sure to do our best to earn in both ways.
Maybe you can do both if you have a large sum of investment, mining needs really a huge capital while with trading you can start with some decent amount
if you want to deal with both you also need to gather more knowledge and deeper understanding, you need to classified if you can handle the risk and how well
you can deal with analyzing and assessing the market.