You don't need to wait for few weeks, months and years to obtain your profit. That is the big advantage of daily trading but it's disadvantage is it's opposite, you can also loss your investment in a short period of time if you are doing it wrong. So it's better that you will study it first before engaging to this kind of trading.
Exactly, the good thing about trading is that you can easily exit even before the market closes to avoid losses or risk. Day trading can also be very profitable because of margin or leverage trading but make sure you do it right but if you don't do it right then it can also be very unprofitable. Before entering in day trading make sure you have enough knowledge about it because it is very risky.