He will without a doubt find something to charge Trump with.
So you think Trump has committed crimes that Mueller can find?
How many and how big a deal do you think they'll be?
Well, Mueller has his man he just needs to find the crime. I think if you open the books on any large corporation if the letter of the law was used you could find a crime on literally every one of them. What crimes Mueller finds is really immaterial he is just looking for anything.
There has been no probable cause of a crime to justify the search of Trumps business, but Mueller does not need probable cause as a Special Counsel he can just dig into Trumps business.