Bitcoin is NOT the ONLY anything.
It is NOT the only money.
It is NOT the only cryptocurrency with a limited supply.
It is NOT the only open-source, decentralized coin.
It is NOT the only coin with a paid development team.
It is NOT the only cryptocurrency to have had it's blockchain rolled back.
It is NOT the only crypto with a loyal fan base.
It is NOT the only coin to be a fork of it's former self.
It is NOT the only coin with an anonymous creator.
Only proof of work and that’s what matters.
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Doggie coin and Monero are both proof of work blockchains
As are Litecoin & BCasH