If you want to earn much more in trading, you need to have the minimum amount of $100 dollars. Because in trading you need to consume time before you earn much on it because your earning is depend on the swing of altcoins. To prevent loss, you need to wait until the price of altcoin is up.
I do not think $100 as an appropriate initial capital for beginners of trading. They should not risk big when are are not ready completely for market fluctuations.
Moreover I have seen some experienced traders are always do trading with less than $50 worth of altcoins, they justify it as a risk minimizing method. When you are targeting some consistent profits rather than greedy big shots, I guess sticking with minimum all the times may ensure your success due to proper risk management.