In cool or cold months, when I am shooting (or hunting) nearly every day, I will leave it in the truck strung.
I would NEVER leave a strung bow in the truck in even mildly warm weather. The inside of that truck can get well above the temps of the hot-boxes or heat presses that are used to build the bows. Delamination is much too likely to risk.
I don't leave them strung in the house because they are too hard to store that way. If I kept every bow I own strung in the house, I would need 3 times the amount of storage space. I have a long row of pegs that I hang my bows verticaly from.
I know many folks leave their's strung all the time, some for years and years. I can understand that there may be very little damage, but it is simply against ALL the laws of physics to assume that there is none. I have even heard that some custom manufacturers recomend leaving them strung. That's fine. I'm not gonna do it, especially with my older bows. I doubt the glass 45-50 years ago was as good as the stuff these days anyway.
It's not difficult or time consuming to take the 30 seconds it requires to use a a good stringer and slip the top loop off the limb-tip.
Long story short... do what you like and what works best for you but think about why your doing it and what the eventual consequences might be.
OkKeith