“Controlled” is a strong word considering that there is no master key that can just misuse all the tokens secretly the way that FTX or Celsius did. Everyone gets their own key, to move their tokens.
Even if Ethereum comes to be controlled by a few people, their incentives are not to kill the value of their own ecosystem (unless they are a state actor, or if all Ethereum tokens are somehow bought out completely by Elon Musk lol). And the only way the blockchain can get screwed is by miners ALL agreeing to refuse to mint new blocks. Or miners could re-order transactions within a block, which they already do. That’s it.
Now you could say that the dollar reserves of USDC are controlled by one company, and I agree. Even though USDC is run by Circle which is a regulated company that can pay out with no slippage to your bank account, and receive dollars the same way. They are one step away from banks and may even get insurance and reinsurance similar to FDIC.
But you may still not want to see one company be the gateway. That’s why we started the Intercoin project, to make a truly decentralized ecosystem including decentralizing the gateways too (just like the Internet is).
But for today, it’s already no different than any bank in the Free Banking Era, which is how the United States did almost all of its money all the way before the greenback. As long as the music is on and the musical chairs are moving, your $500 in tokens that you use for your consumer purchases is safe.