It is true, but today's richest people also had to work hard or to be very inventive to become rich. Bill Gates is a very talented person who created a big company and Windows is the most used operating system in the world. So he deserves it. It's not easy to do what Bill Gates did. The same is true for most self-made billionaires. They all achieved extraordinary things, or they were extremely talented in some area.
This is completely different from someone who simply buys bitcoin, and 5 years later, voila, he is a millionaire.
Investing in bitcoin takes intelligence and a high risk tolerance. If you lose your private keys then whatever money you put into bitcoin is gone forever and can never be recovered. This is the primary risk as I see it, but only because I know enough about the protocol and economy and history and psychology to see that bitcoin will inevitably keep growing. If not for that, the perceived risk would be far higher, and it is for a lot of people. Intelligence, risk tolerance, or both is what makes bitcoiners deserve their wealth. And cowardice and stupidity is what makes the masses deserve their wage slave jobs.