None of us thought Dogecoin could get where it is.
Looking at it now, I think they could push this anywhere.
$10 - $15 even
Trillion dollar marketcap? Sure, why not.
Everything can happen but in a perfect time. 10$ -15$ is very far from reality for now, but not impossible. If it happens, BTC should also go up in order not to be replaced on the top 1 rank.
If we watch closely on Coinmarketcap, as long as the Doge's price increases, Bitcoin is only at the same price even though the chart turns green. From this point of view, we can assume that there are some Bitcoin assets in Doge. If the price of Bitcoin is pumped, Doge will drop. That is, Doge will not go beyond Bitcoin's market cap.