There are always risks in business and if you want to make BIG gains then you'll have to take BIG risks too. In last few months, Bitcoin hasn't moved much up or down after the January's hype and dump. So I don't think engaging in Bitcoin puts us at any risk.
And the bigger your investments the bigger is your fear and the more risk you will take. Bitcoin has not yet recovered today but let us just wait.
Overall cryptocurrencies are a risk, but with good timing, planning, research and a sticking to your plan will help you in the long run, even with big risks it will be easier.