I prefer investment because investment does not need to keep checking the price of our coins. While trading takes a long time and must have good skills. If we are not smart in buying coins we can experience losses. While the investment risk is smaller and the profit is also large.
It doesn't really require checking all of the time but if you have invested heavily to a certain crypto then you're worried most of the time, and that's the reason why you have to check it from time to time.
And for trading, it doesn't really takes a long time as you do it. What's taking it long is how you will understand trading alone and how to be good with charts reading and technical analysis.