Yes it is risky unless you have a lot of money and then you can spend it how much you want i would not put all in to bitcoin because if it fails you will regret it every moment i would put 50% in it and keep the other 50%.
Yes true. All investment have risks. And we do not know what future of the Bitcoin is though there will be a large chance that it will have a positive future. We never know. So put just money that you can afford to lose.