The game started at 1998 went beta at 2001 and then RIP around 2013 but still the game is up now
coc is an mmo.. last time I checked it was a mass multiplayer online game.
Supercell know CoC is a cash cow and will be careful not to do anything stupid to ruin it.
IMO, the biggest threat to this game would be if a bigger game developer acquired Supercell and proceded to mess things up.
So basically regardless of what it's classed under, 5 years is definitely realistic
IMO as long as SC does not give out an update that ruins CoC, it will stay very long. I would say another 5 years is realistic, maybe even more because CoC is literally the best game of its type, none compare to it :D
MMO = Mobile Multiplayer Online.. So yea it's an MMO 😉