Partly, there's a big role that Elon Musk had been playing with as that joke begun to become serious for all people who been following doge. His popularity gathered much attention, then the masses took a ride on the trend that's why we've experienced a huge pump which everyone considered it as part of an altcoin season.
Furthermore, altcoins volatility shouldn't be take for granted and keeping an eye of its movement is always our precautions.