The distinction lenders draw is between income and net worth. A conventional insured mortgage is underwritten against provable income against a 39 percent gross debt service ratio and a 44 percent total debt service ratio, and a large unrealized crypto balance does not change either calculation on its own.
A minimum credit score of 600 and standard documentation still apply regardless of what other assets you hold. Converting some Bitcoin to cash well before applying, and being able to show the paper trail, is generally more useful to an application than the holding itself.
A mortgage broker can confirm exactly how a specific lender will treat crypto assets on your file. Get your hand-reviewed valuation from Joel Dyck.