In one word everybody who know regarding bitcoin can say that BTC is good investment, I mean if you invest your all the money to Bitcoin then you will have to won your goal to rich soon and grow your best,.. 
This will be true only if value of Bitcoin will grow up. I know that it`s growing for some time, but what if someone bought in time of big buble last time (end of 2012) when price were 1,000 USD. He is on 60% of initial investment now. This is not best investment.