The dogecoin is currently experiencing a market sentiment which is basically a normal market conditions. One of the reasons why price dump is because many investor/traders that bought dogecoin at $0.004 will definitely take profit even as the opportunity surfaced. Just emerging a coin holders that has been holding dogecoin at $0.004 for over 8 months, and seeing that the price has surge to a new all time high of $0.072, a 700% rise, will love to sell. Every dogecoin holders has seen that dogecoin has pumped dramatically, an opportunity to sell and make further investment at a deep price is currently playing out.
The dogecoin price will be unstable for over some weeks before a new all time high can happen. This is just my opinion.