Drawdowns on your account are part of trading but if you establish a trading plan then it will enable you to survive these losses and not wipe out your account.
What do you think is the best way to utilizing one's entire capital? if say I use 2% a trade, do you think it's ok to open 50 trades? I know it's very hard to manage 50 trades but theoretically, how does it sound like in terms of risk management?
moontumble
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This splendid advice is one of the most basic yet underappreciated issues, especially for beginning traders.
As you eloquently put it, understanding that every step down in your account equity requires substantial and increasing effort as well commitment to break even again (which some traders mistakenly feel compelled to translate into taking on greater risk, with sometimes disastrous consequences for one's total equity).
Do yourself a favour and listen to tradewonk's advice here, manage your assets and risk properly, and protect your profits at all costs.