Baseline: do nothing is valid
Cold storage with occasional on-chain sends is a complete strategy. Many wealthy Bitcoiners optimise for sleep quality, not APY.
Lightning routing (advanced hobby)
Running a routing node can earn fees, but capital efficiency and uptime matter. Start with small capacity and expect learning costs. Read routing realities.
Wrapped / bridged BTC products
Porting BTC to other environments for DeFi means trusting bridges, custodians, or liquid staking designs. Stress events can break pegs — see LST depeg framework.
If you cannot explain where the yield comes from, assume you are the yield.