I do believe in bitcoin but I can not take the risk of investing all my saving or all my money into it.I am afraid because I know to myself that I don't have so much knowledge in investing,I need to learn more maybe in the future If I am already confident enough to take all the risk then I will invest all my money.
I think its good thing you did not invest all of your money in BTC. I also believe BTC is a great investment but at the same time is risky and only with time will the profit show.