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What is your definition of centralized? Anyone can host a validator node on their own. https://www.stellar.org/how-it-works/stellar-basics/

Edit: https://www.stellar.org/how-it-works/stellar-basics/explainers/#Decentralized_network
That's a better link.

controlled by company. Owner is a company and they own more than 50%.

I see. Which coins do you not avoid?

btc, eth ,ltc, bch, monero, dogecoin and so on.

lol. I can't tell if you're being sarcastic now.

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