Do not let it rest on your chest and do not bounce the bar off. This can not only damage your rib cage but also reduces the effectiveness of the exercise.
This statement is 100% truth. If you "bounce" the bar off your chest just as it explains - you're using the momentum from the decline, and it roughly decreases the effectiveness of your incline by about 50% per rep.
Also, I see guys go to the gym just about every single day to lift. You should only lift about 3 days a week. If you lift just about every single day, you'll get little results. Alternate, upper-body day 1, lower-body day 2, etc. Most guys who workout do it primarily for cosmetic purposes, and therefore focus more on their upper-body vs lower-body.