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.