If you trade Bitcoin and are good/lucky enough to time the buys and sells correctly, then you will make more money trading than holding. I have found that with trading it is sometimes very hard to know when to sell or buy. I have had times when the price of Bitcoin had a big increase and I sold, but the the price kept rising and I lost out on some more big profits.
My suggestion is to hold some Bitcoins for long term and trade a little. This way you are doing both and you won't miss out of big gains like I did. Another negative to trading is that it takes a lot of your time if you want to do it right. You have to be watching the charts every day.