both of them is difference, but to make it easier to understand, when you investing, you trust your money to someone and you don't need and can't do anything with your money until certain period, when you trading, you used your skill and knowledge to generate profit and you need to some work in trading, you need to pay attention to the chart and keep the updated news everyday
so when investing you depend on somebody else when trading you depend on yourself
Yes you are actually right, i want to add that in both there is always be a risk it just depends on how you will manage it. If you are going to invest or to trade you need capital or a source of bitcoin to start on it. Then you need to have knowledge and prior idea on a specific investment you will choose. But you can lessen the risk if you will dedicate and you will set goals to earn more. You need also to put in mind that its better to take the risk because if you will work hard it is sure worth it because in bitcoin it is a sure investment and an easy way of trading.