I can't speak for "cryptocurrency/defi" culture but self hosting is definitely very strong on Bitcoin maximalist space. I think the idea spams from running your

I can't speak for "cryptocurrency/defi" culture but self hosting is definitely very strong on Bitcoin maximalist space. I think the idea spams from running your own node to search and validate transactions privately and without the need to trust anyone or leaking data that might associate that transaction to you. I guess the reason for that is that Bitcoin maximalism also overlaps with libertarian self sovereign ideals and censorship resistance. And I think this is attested by the number of projects similar to Umbrel like Ronin Dojo, Raspiblitz, MyNode and even hardware vendors like Nodl and Start9. CryptoCloaks sells accessories like cases for RPis, a popular device for running Bitcoin and Lightning nodes. Some people might even go beyond and get their blocks from the Blockstream satellite transmission. I'm not sure you'll ever get stats about that because those people like to remain hidden. Perhaps the growth rate of Bitcoin and Lightning network nodes operating on the Onion network might be a good starting point.