Yes, in short, you can start bot trading with any amount of money, the main thing is making sure your strategy is calculated correctly, making sure to follow normal caution that would be followed when normally trading. Obviously, you will make more money in the long run if you start with a higher amount of money, but the ROI won’t change based on the starting amount. As long as the exchange you are using allows you to start with $100 then you will be perfectly fine starting with that amount, as long as you are comfortable potentially losing it.