I too never came across any such specific term except HODLERS, the term specifically for bitcoin holders. But it's a great question, there must be some specific term for crypto enthusiast guys.
I'm in favor of using crypto enthusiast or bitcoiner if I don't like to write longer words instead I use bitcoiner for shorter one. I never heard of any other term like the op mentioned except the known terms that have been used by many people. I think the person who think of cryptoer did base it on like the word "Party Goer" where he/she did only add "er" at the end.