perhaps some new project - create a fork of doge and focused on anonymity and fast transactions with using supermodern post quatum computing cryptography without blockchain -maybe tangle -- would not be bad ....doge is one of the oldest coin - still have good name....if is more modern and inovative in something -- it can easily be successfull 
Doge already succesful with more than 1.5m marketcap.
XRB is super fast and fee free coin. So better than DOGE. I think if XRB gets to most of exchanges most of people will not use Doge for withdrawals from exchanges any more