Not at all. Here's one possibility supporting 7 chips (2 chip limit set and a 5 chip cash set) without repeats. (Not using this design, just pulling in colors.)Isn't it kind of an impossible task to not have any colors repeat?
I even had several sets to look at options, including one with 3 colors on the 25¢ and 4 colors on the $100. Ultimately, I realized I didn't need the $100 and shifted the colors a touch. You'll notice I also left out some sweet colors: DG Arc Yellow, DG Pink, Butterscotch, and Blurple. Plenty of possibilities.
Edit: Also- I built a 5 chip trimoon non-repeating set with a solid frac, 1 spot color $1, and 3 spot colors on the $5/$20/$100.
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