Investing in Bitcoin is so risky especially if you dont have much knowlege about bitcoin, it take time to learn , some times you been scam , because you dont have enough knowlege, you invest in scam site, using bitcoin , and also bitcoin up in down in price, mostly people will panic and when bitcoin go down they will sell,and of course you loss money.
But not as risky as it seems when we are going to turn electricity into cash by mining,despite the fact we must take into account every possible ways when we are investing in mining business too.Anyway,In essence bitcoin provides the best way to turn electricity into cash,therefore its profitable because miners don't need 10k$ to earn 1 btc, but when we are talking about day-trading of course its a risky.It doesn't mean that mining business is not risky but its more like a security risk,In another situation every single step in our life contains risk,but we can reduce it by our 'predictions' and views.