I think that day trading is too risky, because you can not analyze the situation on a daily chart. In any case, it is better not to engage in trade if you do not know how, because you are more likely to lose everything!
Truly Its not really logical to say if which one in these would be much riskier .Probably everyone has their own opinion about holding and day trading. As you can see also therere so many people getting benefit from day trading, but on contrary many others reap a huge fruits from day trading. It mostly depends on your skill and experience that leads you to choose holding or day trading. Youd better to realize which is much more suitable with yourself, dont get concerned on someones choosing because your stategy is quite different from others.