Although I agree you should buy what you like, I do think this looks dated. Since Phoebe Philo no longer designs for Celine, I think this will be seen as an old style as Celine goes in a different direction. It is the same with Balenciaga, for example. It has been rumored that the City bag will be phased out as more people are liking their newer designs (not me, but that's a different story, LOL).
If I wanted a basic black bag for work and travel, I would go with a non-distinctive style if I wanted it to always be in fashion. Many designers make beautiful black bags. I believe the Saint Laurent totes are very popular now.
If you search for which bags truly maintain most of their value and are always in style, it is still the big three - Hermes, Chanel and Louis Vuitton.