I think dogecoin is like Tron trx currently because there's nothing much happening in the project no development or something else except for the use of payment purpose and it's cheaper, of course Doge is one of the oldest coin out there and lot of projects that was created same time has long gone, example, EOS and few other coin. I think investor are all done with such project and their interest now on another pump dump projects.
Next to the new coin, that's how the crypto investor in the crypto space visualizes all the projects in the market, except Bitcoin. That's the reason why, when some potential coins are recently launched in the market, you see many investors rushing into the new coins for quick gains, abandoning or forgetting about the old coins that have no more marketing strategy and project development, while new coins that have good marketing and project development, investors are investing in them.
For old coins that couldn't keep up with their project development and marketing, you see them disappearing from the market. That's why you get to see old coins becoming less popular in the market to attract big investors to invest in their projects. For Doge, it's already an old coin, and its fate lies on Elon Musk to tweet about her.