The truth is that Elon Musk gives life to Dogecoin by his tweet. That is the main reason why Dogecoin become like that, everyone is not expecting such a high rally but all exchanging and mind-blowing when EM does the shill.
Well, Doge is one of the top altcoins in the market but such a rally helps crypto holders to before profitable and I think that they are much thankful for the said event. But I'm not sure if it keeps the momentum when EM is done cos his support might just a temporary, He's now investing more in Bitcoin, not Doge which could be anytime the price will dump so bad.