Choosing Oxford and Imperial

Would it be a bit dangerous to put down Oxford AND Imperial in my UCAS choices?
I'm predicted A*A*A* and want to do CompSci but I'm afraid of putting down two top universities.
I've currently put on Oxford, Warwick, Sheffield, Nottingham and Loughborough. Imperial would replace Warwick as I don't feel too comfortable putting down two A*AA unis.
Am I being a bit too fearful?

Depends on how realistic that A*A*A* prediction is but I honestly don't see the problem here because you have got some pretty secure choices (I know somebody who got an offer from Nottingham with predictions far lower than yours) so you're almost certainly not going to end up with zero offers.

Hmm. I'm considering putting Oxford, Imperial, Warwick, Sheffield, Nottingham.
This whole process is just making me feel insecure about whether I'm smart or not .

It would help if you told us what your AS results are but I'd have thought that you'd certainly get at least 2/3 offers. Oxford and Imperial are incredibly competitive for Computer Science of course but there's no reason to think that an application would be a waste.

I got AAAA (Maths, Further Maths, Physics, Chemistry)