I think Doge can survive without Elon's tweets, Doge is already a part of top coins right now. Not only a top coin, Doge has many investors and even whales that put their money there. Another reason, Doge has a big community that looks loyal to support the development of Dogecoin in the future. Because of these reasons, it is very possible for Dogecoin to survive although no supports from Elon Musk. We cannot say Doge is a shitcoin anymore, it is one of the top 10 coins lately.