Yes, at one time Giuliani did good things. That was over 25 years ago. Giuliani is nothing more than a muckraker for Trump nowadays.
And yes that is a prediction. But it is an informed prediction. It is informed by the fact that so far, every case has been tossed for lack of evidence. I can go around making false assertions and filing false lawsuits all day too, it doesn't mean that anyone should take them seriously, and no one would. The only reason that we give these assertions oxygen is out of deference to the power these people hold.
Follow Up: The NY Post editorial board, one of the few boards that endorsed Trump has offered the following advice:
"Get Rudy Giuliani off TV."
Even the Post doesn't give Giuliani credence. Trump will get recounts, none of them will move the numbers in a meaningful way, just like every other recount in the history of Presidential recounts.
> These aren’t serious people. They never have been, they never will be.
Well, Giuliani prosecuted the NY mafia and won, so part of this statement is a little far fetched.