I see a lot of newbie traders complain about lack of trading capital. And I want you to know that you are focused on the wrong thing. Your attention should be on focused on the trading skills first before worrying about the capital. Trading capital is not the most important thing in trading. The most important thing is mastering the skills. No matter how big your trading capital is, if you lack the trading skill you won't book any profit and will most likely blow your account. On the other hand, if you have the skill set, you will be able to handle and grow any trading capital into something substantial.
Contrarily you can't become a trading master with $100 as capital because it will restrict our decision making ability and also we should pay more to the transaction fee since we can't hold a pair when we see another pair is doing good.
Yes you are right. Trading with a small account size would limit your decision making. But you should also know that, trading with a huge account size without the right knowledge is like walking in a mine field, it's only a matter of time before you lose it all.