MC - evidence by Reference letter + salary

I’m a Blockchain Software developer.
Could be enough for MC to provide a very good reference (not a recommendation!) letter from a very well-known person from the Blockchain industry (not my current colleague) + a high salary (twice of average in the UK)? Do I have any chance, or it is even not worth trying? Of course, I could also demonstrate my work in blockchain, but all had been done as my work activity.