We can really have both if you do know on what you are doing but of course it would really be needing more capital for this one.Investing is for long term and
trading is for short term and you are right that this will really be needing skills and experience for you to do both things in more efficient way.
Both does have advantage and disadvantages to each other but why would really need to chose if we can have both and make most money on it.
Sounds easy but it wont really be that simple.
Well both were exactly profitable but the main concern here is where areas do you really good at. Both were profitable but they only differ on what approach you can exertly good at because i doubt that onr person can be both good to perform the two. However, wherever which one of the two you are good at, both are also need a capital which you are needed to start whether you're going to trade or to invest.