Doge is abandoned by it's developers, still it has more real world use when compared to other altcoins. Doge is one of the most used coin in cryptoworld in terms of tipping and in gambling as well since it is not expensive and is easier to gamble with because of it's fast and cheap transactions. It is also accepted as payment by some merchants and uses the services of shapeshift and similar services to accept it easily. As long as there is someone using it, doge won't be gone and for this reason it has survived for a long time.

Dogecoin is for fun rather than investing. Good to send to people as a tip and to introduce them to crypto, but if you want to make money - choose another coin