if you want this coin to be taken seriously, you shouldn't underestimate the importance of branding. tbh none of the logos look professional to me.

why not post a contest for a few hundred bucks online and let the professionals come up with something great? here are some sites you can use:

https://99designs.com/logo-design
https://www.logomyway.com/readyEnd_design_contests.php
https://www.designcontest.com/logo-design/projects/
http://www.designhill.com/contests