1) Bitcoin price might go down
2) Govenrment might ban Bitcoin in their country
3) Panic selling might happen
4) Bubble price might pop and lead do big drop of price
5) Price ceiling might hit which then price will only go down.
6) Hackers or just being neglectful and loosing your account
7) Bitcoin might be used for illegal activities and might push the prohibitation or freeze the trading of Bitcoins.
thats why its really a big risk for those who doesn't understand the system but for us who study the chain and see the potentials even there's a lots
of risk we tend to continue and keep holding and aiming to have much more bitcoin in the future.
If we complete the statement it would be like
1- Bitcoin price goes down but then increase soon surpassing all previous peaks.
2- Government banned smuggling but it did not stop. China banned dealing in BTC but Chinese are still into BTC.
3- Panic selling is done by only new investors and it is actually good for the health of BTC.
4- If it would have been bubble, why is it still surviving?
My point is, nothing is perfect but BTC is the future of money. Everything depends upon us. It is not easy for hackers to steal money as easily as it is said. It has a very secure algo.