The only safe way I know of to get passive income from Bitcoin is to use https://github.com/JoinMarket-Org/joinmarket-clientserver though that may lead to your bitcoin becoming "tainted"
There is also https://thorswap.finance/ but using it probably carries a risk of total or partial loss of money
The most discreet method of earning non-passive income is probably through something like https://haveno.exchange/
For less private ways to get income, I'd use something spoken highly of at https://kycnot.me/ that allows peer to peer trading and reputation building