No, trading is certainly not only for the rich. It certainly true that most people have more capital to invest in trading than others, you can still start up with any amount you have. You should also understand that there are risk involved and there are no guarantee for profits just so you know. That's you can lose your money through this process don't feel too surprised. There are many successful traders who started with small money they have and has made significant profit. To be successful is to learn, understand the market and come up with possible strategies.
Trading is not only for rich people, but when someone is rich, it will definitely be easier for him to trade even though there is no guarantee that he will get a certain amount of profit. But when someone already has sufficient capital that you can separate for trading, it will actually make it easier for someone to create a strategy after understanding the market through their own learning. And you won't be so surprised when you have to face losses because someone has prepared special capital for this so that it is no longer mixed with the money they use every day.
Meanwhile, for people who start with small capital, of course it will take more time to make that capital grow in the market through the profit targets they expect. Although it is also not bad to do as an initial experiment after someone really understands the market and also knows the best assets in the market itself. But they definitely need more patience and time to be successful through trading because their capital is small, although the level of struggle they have to face is not much different from those who have large capital.