E is a little bit 1990s, but in the context tokens and crypto I think you can just about get away with it - although for the tech savvy crypto crowd some might not like. Also reminds me of ecash which, although part of cryptocurrency history, wasn't a great success and is somewhat at odds with the ideology of modern crypto.
I'd personally aim for about 100k and see what interest I get. I suspect it will ultimately sell for a lot less, but worth a shot.