Since domains with crypto and bitcoin are harder to grab, I'd try some alternative ideas, like:

1. You can think of a beautiful long(!) name for your project, then find a shorter domain with the acronym/initials of that.
Help out struggling beginners in crypto related problems => hosbicrp.com => free for grabbing.
Of course, I am sure you can find better name than this ^^ 

2. Search for domains in certain countries. Like cryptohelp.it, cryptohelp.me or such.