Honestly speaking, Every investment has some risk, so Bitcoin is not out of this.but that type of risk is not measurable by anything. If you want to invest your money then you must take a risk Because you don't know the future situation, so you have taken a risk....in this way, Bitcoin investment is also as alike...
Even I know that, Most of the people fear to invest on bitcoin due to price fluctuation only. There are many platform in bitoin which can provide easy returns to your investment with the amount we invested.
If bitcoin is become a legal in use in developed countries there is possibility to invest on bitcoin like how we do on shares and projects.