I just bought a new mtn bike for a little over 3 grand (which is a lot for me) and I can't stop checking the basement to see if it's still there. It's got a U-lock through the back wheel and it's attached to a support column with a cable.

I also bought a cheap door alarm but I'm scared I'll sleep through the noise.

Anybody else experience this? Anything else I should to do ease my mind?