SpaceX CEO Elon Musk has finally picked one out of the thousands of cryptocurrencies in existance and declared that it is the best. And it's not Bitcoin.

It's Dogecoin.

Dogecoin is a cryptocurrency that was invented as a joke by Jackson Palmer and Billy Markus—but it took on a life of its own. With the Japanese dog breed Shiba Inu as its mascot and an entire language built around the coin, "wow, such coin, many profit," it developed a cult following.

It's not the first time Musk has showed his love for Dogecoin. He previously changed his Twitter bio to reflect that he was the CEO of Dogecoin and once tweeted "throw a dogecoin to ur witcher" before deleting it shortly after.

Today, he first tweeted that "Dogs rock," with an image of a dog celebrating its birthday without any concept of numbers. Underneath it he added that dogs "have the best coin."

Musk has spoken about Bitcoin and cryptocurrency too but in peculiar ways. He once tweeted, "Cryptocurrency is my safe word," before later adding that, "Bitcoin is not my safe word."

He has also spoken about Bitcoin too, saying that it could be a replacement for cash in terms of enabling illegal activity. But that he doesn't see it becoming the main method of payment around the world. Perhaps that role is reserved for his favorite cryptocurrency. Wow.