Hmm I think it'd be better if it drops. Diff is going up fast ;/
When difficulty is going up fast means much more hashing power, computers, included into the mining. The purpose of that is in the preventing of successful mining bigger amounts of coins and dumping immediatelly. That means it is controlled by organizers mostly, at least at the beginning of the pump.
See at the chart on Dec 19, DOGE was at high of 0.02000000. That was initial pump. Now, todays pumped DOGE is still below 0.00000100.
Buy low, sell high is the rule. It means buy at the beginning of the rise, not at the end.