If you can afford it and will ride it, it's not a waste, now I would say which 2.5k bike may be a thing to consider. Going from an upright citibike to a low and sleek race bike might be a bit of an adjustment for you, so if allowed I'd say try to take a test ride and make sure you will be comfortable.
Also understand at 2.5k the bike may not come with pedals, you'll be encouraged to buy clipless pedals and shoes, a helmet some lights and you could have an additional $500 or more before you are ready to roll.