There are lots of holes I picked in the whole clergy situation as you narrated. Let me dwell on just three of them for didactic purposes.

First, I like the part you posited that you didn't want to hodl the investment for him but that he should get a trusted child of his to hodl and monitor it on his behalf. That's what I also do. This has helped keep me out of trouble with people. Once I set it up for them, I let them keep it. I only get involved when they want to sell or transfer if they can't do it on their own. Nobody likes to see their investment depleted and if that begins to happen they want to quickly blame it on someone if they aren't seeing it go down themselves.

Second, I would never suggest crypto investment for someone going into retirement. It's too dangerous, whether it's on a short term or long. What if wallets get hacked? What if passwords get misplaced? What if coins dip at a time they're in dire need to sell off and attend to their financial needs? There are so many "ifs" to it.

Third, I don't understand the part where people have to wait until their retirement to start up something that can get them passive income. Your clergy's situation cuts across many civil servants I know. Most of them find it difficult having investments by the side while in active service and that's lack of financial wisdom.