I think bitcoin is now not risky as earlier because now bitcoin is spreading in this world. Earlier only some people know about bitcoin and has holding large ammount of btc ,dump is on those hand but now many people investing in the bitcoin and it will not going to dump very easily. With limited circulating supply bitcoin is not risky as I understand.
The danger is not in bitcoins, but in the likelihood of their loss. There are many scammers who use viruses to infect people's computers, who may have bitcoins, and scammers can demand to pay them to get rid of the virus and return their information to them. Also, not in all countries, the authorities are friendly to bitcoin.