Small and big capital is relative to the investor. Personally, Ive lost a lot to day trading so I no longer do it and I advice against it. It can be stressful and and drains one of energy, I just buy and hold, it seems like a better strategy to me. If you must trade, go in small.
Yeaaa become a day trader really cost you a lot of time and energy , you have to watch the market every single minute.
Otherwise you will miss the golden opportunity making money in short period safely.
Doesn't matter about the capital size , the only matter is to make your trading produce you a steady income.