Doge should be dead but it's not and it isn't going to die because it is merge mined with LiteCoin so as long as Litecoin is mined the Doge network will continue to function.
It's uses are as follows off the top of my head.
1. listed and accepted everywhere (Tips, gambling...)
2. fast transactions
3. cheap transactions
4. can be used to get funds off of any exchange thats not outright blocking withdrawals.
5. good intro into crypto for n00bs.
It isn't being developed but last time I checked it was getting patched if need be since it is bitcoin code base it's compatibly with all bitcoin patches. It really doesn't need anymore than what it is, it has a friendly community that makes it easy for entry into this space so it's good to get new people involved that need everything ELI5.
But yeah it should be dead but it's not and it's not going to die anytime soon. AFA getting a pump to dump your worthless shit well who knows there are always people targeting coins for P&D's just be aware thats all it's going to be it will never retain any value for any significant amount of time. So when it pumps get out of that shit you stupidly bought!