OP it is not good to be trading and at the same time investing for a long term. This is because you cannot serve two masters at the same time. You must dedicate time to one than the other. The disadvantage is that trading is prone to losses and as someone that is emotional, if the funds that you reserve for trading is lost, you might be tempted to take some part of funds from your bitcoin investment for trading to see if you can make profit and before you know it gradually your bitcoin investment portfolio will start depreciating and if you cannot control yourself, you might trade all your investment. Stick to one trading or investing. I will go for long-term investment because it saves your funds from depreciation and gives good profit. Trading is 50-50 profit/loss.
you are very right mate,there is no way you can give hundred percent attention to the two,we all know how trading is hard,and for you to pay attention to the margins and be able to remain active on it,and at thesame do long term investment,it's going to actually worry,or you should always bare in mind that you will lose money while doing one.So it's better you do one,and leave the other.
If it's trading you want to concentrate on,do that one with all your attentions focused on it,or if it is investment,do thesame,and have patience as it has less risks involved.