No, they don't. Trading is way riskier than investment if you understand the context.
You assume I don't understand the context but you actually who don't know the context. 
Read again what I said above!!!
- I said "almost the same risk", not "totally the same risk".
- I said investing in random coins can also be high risk.
- I've admitted it will be safe to invest in Bitcoin.
Please, please... Read carefully!!
Trading refers to the act of buying and selling assets in shorter terms to gain small percentages of profit from each trade, whereas an investment means that you buy an asset and keep holding it for a longer term to get your desired profits and then sell it when the time is right.
It is not as simple as you think. Sure, it is very challenging to gain profits through trading because it is a very short term. However, it will be more challenging to invest in random coins. You don't know whether it will end up with profits or losses. Again I said, the context is about investing in random coins..