The biggest risk of using Bitcoin is it's price. It's price is unpredictable anyone can't guess the future price of bitcoin it will lose or dump you can lose and earn from it but it is risky.
No if you just look at the value you will forget the real meaning of bitcoin.
The risk and also the unique feature of bitcoin is that it is "no regulation", Decentralization makes bitcoin invincible to exploitable weaknesses beyond psychology and panic from users. Only if it determines retroactively can availability be guaranteed.
Well, every price especially in Bitcoin are volatile or the Crypto industry itself is much more volatile than the regular stock market, it's expected. Everyone "CAN" guess using the Trade analysis, every data in the graph could give something, maybe good or bad indications.
Every investment comes with risks, there is no assurance that every investment you have would generate ROI. It's a matter of how you will play your on the market using the information and data you have.