to me i am only going to hold bitcoins for the price increase and not going to invest it any where else as it is expecting that the rice of bitcoin will cross 1200 USD level in the end of 2016. therefore the best option is to hold bitcoin and not to invest it anywhere else.
Yeah holding is safer in compare to investing and the fact is that we cannot trust any place to invest them and there are more chances of loosing our money, but with holding the power of decision is in your hands.
The advantages of investing your bitcoin is clear, it's a good decision. Mostly people want to invest, but they don't have enough bitcoin as minimal required, so they just think to holding their btc.