There's an interesting conversation to be had about that. Personally, due to its for-profit beginnings, I don't think Brave would have done a good job even if they had followed through on their promises. For example, cryptocurrency has its own issues, and there are ethical problems with replacing a website owner's chosen source of income with reliance on a different, proprietary one.
Mozilla would have to advance much further with Firefox and everything else before any of that is worthy of discussion, unfortunately.