What should I wish for?
Solution 1:
The choose more wishes wish simply generates a new wish in its place and lets you wish again. You won't get duplicate wishes though.
If you like the multiplier on offer a lot, you should take the multiplier and leave the free wish for when the generated wish is something you don't want.
If you don't want the multiplier on offer, take the free wish and it will give you a different option.