In the cryptocurrency world almost everything is public domain (meaning there can't be any copyright issue), like the name "crypto", "bitcoin" etc.
There is no connection between copyright laws and cryptocurrency. Although Coinbase/GDAX etc. are all copyrighted words (I guess). But they are companies...
If not targeting the crypto world, but the "normal" coin market, I think it can be an informative site about copying bank notes or recreating coins and the legality of those things, which are kind of interesting stuff.