In my opinion, the risk in investing bitcoin is so small. Because you bitcoin price is increasing even is unstable. Yes sometimes bitcoin price decreases, but most of the time bitcoin price increase. Over a month it increase to 20-30%. If that case a long term of investment you will earn plenty of money.
Bitcoin does not have the risk because it is just the way to increase the price and the value of the bitcoin I hope the price of the bitcoin will increase more and more I hope the price of the bitcoin will grow fast and the risk is very low at the bitcoin so I hope the bitcoin is the riskless currency and the safe currency. it is the reason the bitcoin is getting famous day by day and they are holding the bitcoin for the long time fearlessly.