I propose to start with $ 100, big money is just not worth it to invest. If there is no experience in the trade, I suggest to try short-term investment strategy is very similar to trade, but more safe in my opinion.
I absolutely agree with you. That's how I started. $100 is something we can afford to lose in most countries and our survival doesn't depend on it mostly. So $100 is a good amount of money to start investing or trading.