See https://ftp.opera.com/pub/opera_crypto/ for the latest build. There was a new build on Nov 6. If you don't have that, do indeed update.
As for why Crypto has been removed from the Opera sites and app stores etc., Opera hasn't said. But, looking at https://blogs.opera.com/desktop/changelog-for-103/ and seeing:
DNA-111280 Import from Crypto Browser to Opera Browser
, it looks like Opera might be discontinuing Crypto eventually where you are expected to move to regular Opera (Opera One).