I think the coin has no future. While it is needed in order to quickly mix up their funds between exchanges. When Lightning will fully operational in the Bitcoin network, and Casper will in the Ethereum network, this coin will not be needed.
Probably. If Bitcoin's Lightning Network and Ethereum's Plasma Framework become highly successful and adopted in the mainstream world, then there's a possibility that most altcoins will fall in the market. However, for that to happen with Dogecoin it's still debatable, since there are already various cryptocurrencies which are faster and cheaper than it. Despite this, Dogecoin has remained actively traded across several cryptocurrency exchanges, which shows that it has huge community support and interest from crypto enthusiasts.
There's something unique about Dogecoin, even if it's not actively developed and maintained unlike most cryptocurrencies we know and love today. Dogecoin is both fun and educational, as it allows newcomers into cryptocurrencies to quickly get started sending/receiving transactions. The inexpensive nature of Dogecoin, allows anyone to own a piece of the cake, without risking lots of money (compared with most cryptocurrencies on the market). For this reason, Dogecoin could have a future after all, as people buy/sell it within the market over time. However, there's a huge risk for Dogecoin's longevity since no development means that it could easily be exposed to well-known attacks within the cryptocurrency space (such as Transaction Malleability).
Therefore, Dogecoin could either survive in the future, or simply vanish if it becomes too obsolete for the modern world. Just my opinion