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Tesla billionaire Elon Musk, who’s repeatedly backed dogecoin over bitcoin, ethereum and other cryptocurrencies in recent months, has again gone to bat for the meme-based cryptocurrency.

[Update: 07/10/21 05:20am EDT] Musk followed up his earlier tweets with further details of how he sees dogecoin eventually competing with the likes of payments giant Visa.

“Block size and frequency should steadily increase to match broadly available bandwidth,” Musk replied to a Tesla fan account asking whether dogecoin’s transactions per second would have to reach the speed of Visa “to be really useful.”

“It won’t need to reach Visa speed, as regulated exchanges will act as de facto second layer,” Musk wrote. “But the perfect should not be the enemy of the good—it is still good to increase base layer transaction speed and lower base layer transaction cost.”

Musk, the self-proclaimed technoking of Tesla who was once voted dogecoin’s CEO in a tongue-in-cheek Twitter poll, warned over limitations he sees with bitcoin and ethereum, branding them “slow” with “high” costs.