Rich indicates you have healthy amount of capital to manage your trade right? Actually if you have money then it will help you in many ways during trading. For example if you mistake in your technical analysis and loss your Capital, then rest of your money will help you to take another trade and recover your loss. But if you don't have healthy capital, it will be hard for you to restart and recover your a loss. But that doesn't mean without healthy amount of capital, you can't trade! You can start with small amount too but of course in spot trading. Otherwise your account will be zero for your one mistake
Yes trading is not just for the Rich, but the rich have an edge over the market in the place of loss due to technical analysis problem Nazmul012 stated that speaks volume in my heart, many with financial survent into trading can easily fall back and still gain their loss when their focast is going against the real market structure but very difficult for anyone who can't afford such finance.
But most cases one may be technically inclined and still gain ground during the trading without have much finance to Carter loss if any occurred , such people don't speculate so high in there technical analysis but only target smaller profit which can't even be see as 50-50 ratio of loss or gain the target always fall below this kind of market range why trading and still make something out of it.
Some may be also financial ok but still speculate or predict high and continue lossing in the trade I believe the trading is deem fit for any kind of individuals weather rich or poor but what retain you is the ability to trade with good analysis.