Or maybe it’s because Casa supports eThErEum
Some folks think Casa is too expensive. This may be true if you don't have much to lose.
Paying for a nostr:nprofile1qqsvwcwuwcwmucx3s7dfs54m49h7uclw4vxh8ygu25m9chk0ypy5ngspzdmhxue69uhhwmm59e6hg7r09ehkuef0xlzhgv membership is almost assuredly cheaper than losing all of your bitcoin.
Or maybe it’s because Casa supports eThErEum