Your odds of hanging on are awful. Think about how many comics became bona fide stars 5-10 years ago, and then ask yourself how many of them have maintained that status. And those are just the few who broke through to the big time… what about the hundreds of thousands of other comics who never have any claim to fame greater than a half-hour set at Caroline’s in NYC? They don’t have a long way to fall, but fall they probably will.
There’s no tenure in the land of funny. Good luck keeping things rolling, if you can even get them rolling in the first place.