If you would ask just random people to name few coins, there would be btc first, LTC second and Doge third. And yes next year it will change or in 2 years. Nothing last forever.
It's changing already - here is
article on Forbes.com where doge named after BTC, litcoin is being mentioned somewhere in the end of the text. BTC community on Reddit was deeply offended by comparison like this. I guess people are less skeptic today as doge hit almost twice bigger 24h trading volume than LTC (3.6M vs 2M).