I've broken the 55mph speed limit a few times on a bike coming down major mountain passes. It is soooooo fun! The gyroscopic effect of your bike wheels will tend to keep you upright and your momentum will make you sail over potholes, so I really have no fear. Speed is your friend when bumping over small obstacles. You only live once so enjoy it!

Sure there is always some remote chance that something could run out in front of you and cause you to crash, but you're more likely to die falling down in your bathtub (THAT happened to my next door neighbor).