This is not the first time that Elon Musk has changed the logo of Twitter. Let me tell you that even before this, one day Elon Musk suddenly changed the Twitter logo to a photo of a dog. It was a temporary step, which was soon removed and replaced with a blue bird photo. But this time Elon Musk seems to be very serious about this decision. It could also be that this is a joke of Musk, for which he is also known. (with language input)