Several factors for a maker to consider .. is the coin going to have a mintage of 50 or 500? Composition..precious metal or plastic chips? Sale price..is your say 1 oz silver coin, excluding digital value, going to cost $100 or $300 ? Is the design original and unique and something many people are likely to appreciate or just something you really think would be cool and is more so a pet project?
Right now I’d say .01 is most common and desired. Not too low for whales and affordable enough for minnows like myself
Also, depends on who the maker is.. How well known are you in the “community”, been around very long? Do people know who you are, first and last name? If you’re relatively unknown around here higher denominations aren’t going to sell well at all. You could be more trustworthy than Mother Theresa IRL, but if we don’t know much about the maker, not much trust history, etc, most will only be willing to buy small denominations like .001.. Check out the pinned scam coin maker list on this board and you’ll see why I say all this. Hope this helps a little.