If he was pumping DOGE, then Tesla could have bought DOGE instead of BTC, right? The only time when Elon said something good about DOGE was a long time back, when he pointed out that it is somehow protected against inflation because the annual supply is limited. Not even in one occasion he mentioned that DOGE (or for that matter any of the altcoins) is a good investment option.

On the other hand, he has continuously tweeted about Bitcoin in an overwhelmingly positive tone. Even in this particular tweet, he is actually saying that Bitcoin is actually better than fiat cash. My point is very simple. Elon regards DOGE as a joke and Bitcoin as an investment option. Those who believe that Elon promotes DOGE will regret about it later, when DOGE ends up similar to XRP.