For me it's not so much of a surprise. Dogecoin benefits from a couple of developments lately:

I think the most important fact is that Dogecoin futures were announced by Coinbase (they're coming still in April according to this Coinbase blogpost from a few days ago). This is the first time a Doge-based financial product is issued on a regulated US exchange (perhaps even worldwide). While BCH and LTC futures are also part of the original announcement, they were already launched at April 1. For Doge, this "sell the news" event has still not happened.

Then of course it's benefitted by the memecoin frenzy in general. While their heyday may have passed already (at least for this wave), Doge specifically may be benefitting from the current developments as people are running away from extremely risky assets, so if they have still hopes for the "memecoin" category, they would probably choose the more established ones -- or some exotic newcomers, but it's not for everyone to search the cryptosphere for weeks for "the next new thing". Doge has performed well in the last weeks but did not explode completely like dogwifhat and friends, so people may be seeing still potential to the upside.

This is not an advice to buy Doge now, I'm quite skeptic about it and it could of course crash deeper. But in comparison to other memecoins they seem now a relatively acceptable choice.