Day trading is a bit risky in my opinion.
It is risky if you a) are unskilled in trading, b) are not rigorous with your analysis and c) do not practice good risk management. Most people blow up their accounts because of the third reason.
Exactly, this is what happens to newbies in trading. There is a lot of panic selling which whales take advantage of
Knowing when to buy and sell is the hardest part of trading