The article was published back in June 2021.
It wouldn't be surprising for him to accept BTC again in the future but the Doge community will be upset if he doesn't continue trolling. It's strategic for him to do it. He has Tesla Stocks to manipulate and he also has Doge to play around with.
I will see that it is possible that Elon stated that he will accept Doge and BTC to have more profit opportunities, he is the one who will do that for the next time in my opinion, if he only said that only BTC was received it would cause an uproar among the Dogecoin community because they no longer receive any more attention from Elon and the statement that Dogen is a coin cheating Elon will get stronger and he will be prosecuted for his actions at international institutions maybe because he has deceived many people with the dog coin, most likely Elon made a statement accepting bitcoin and doge for his safety if he wants to do it again.