Do you think that someday the final fantasy series will die?

[Kantor]

Eventually, yes. Before then, though, it's got about 20 years of being a quality series, then around 10 years of instalments every year with few improvements, then ten years of being complete shit. Should end around 2050. Either Square Enix will end with it, or they'll go on and make something else good.

See: Sonic.