Bitcoin is not a centralized system and is not transparent everyone watches anything that is going like transactions, etc. If it is not centralized then how you can say that Bitcoin is for selected persons?
Maybe what the OP means is that whales have more Bitcoin from the start, so they have the potential to make bigger profits than newcomers. We know that Satoshi's wallet is currently sleeping, and no one knows that one day whether his wallet will wake up or not. Yes, at least the contents of the wallet are large enough to pose a bearish market threat when 1 million BTC is transacted on even the most well-known exchangers.
We don't know the truth, as long as you love documentaries and conspiracies, anything can happen and Bitcoin will probably end when it all comes to light.
But if Bitcoin has a solid network and monopoly does not exist. I believe this network can survive much longer and make a big contribution to the Bitcoin community. The current price of BTC is very volatile and this could make it continue to rise every year if there are no issues with errors in the Blockchain and the whales are certain not to interfere in the trading monopoly.