The idea behind dogecoin was just a joke. And from the technical basement for paying solutions there are really some better coins avaiale. BUT dogecoin was one of the first altcoins so it might get something like an oltimer of crpyto 
Is it true? This is a new information for me. In fact, I'm still curious, why Dogecoin is always there in every exchange.
Meaning, this coin is really useful.