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
You can say that the rich has a greater opportunity of making more money because of the advantage they have in capital. Compare to people that have to struggle to be able to get capital to invest. And they invest heavily and so is there profit if not for that, bitcoin is actually for everybody but we all can not invest the same amount, your investment will now be according to what you can afford. And if is about bitcoin i think people with hudge capital will prefer to hold than trade since it actually involves a lot of money they will go for what is safe. And holding is much more safer than trading. Because imagine after investing good money and analysis fails God help us. 