Is £25,000 too much to spend on a bike?

There is of course only one answer to the above: yes. This week's edition of Cycling Weekly has a feature on 'top end' bikes including the absurdly priced item from Aston Martin. Quite why Aston Martin would make a road bike for 25 grand and then put disc brakes on it is, frankly, beyond me. But there you go.
Obviously, nobody is really going to buy one and its just a stunt: a cupid stunt at that. But, there is a serious point isn't there.

Mr Abroamovic, your bicycle is ready

I have a few people ask me for advice on what type of bike they should buy and how much they should spend. Not that my knowledge of bikes is encyclopedic but its OK.
First thing I always as is what are you going to use it for. Lots of people automatically assume they need a mountain bike for riding on tracks only to get frustrated with difficulty of riding on knobblies on the road.
The advent of the hybrid section has given loads more choice and while the technology of road bikes has increased massively, they are still essentially two triangles stuck together.
For everyday use, I always advise to spend as much as you can and think about a second hand bike to keep the cost down.
Unless you're going to get very serious with your riding there's no real need to spend over a grand on a bike in my view.
Of course, there's always the temptation and if money was no object...