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Those stablecoins are the reason retailers are still holding on to crypto

Exactly lol.

If we go by bitcoins purpose then yes, if we go by consumer benefit then no.

Bitcoin purpose according to whitepaper was p2p which makes BlackRock stance correct.. but it's never is used that way.

Without Usdt, usdc I don't think market would've been like this.

The risk of the other three is that they are not bitcoin?

Actually risk for BlackRock is people holding usdt, usdc won't give any benefit to them.

They're makin everyone bullish on Bitcoin.

Yes, true.