You're being paid 21.2% to absorb price risk. Only ~21.2% of it is real fees — and they stop covering impermanent loss if USDC-CBBTC diverges more than ±321%.
Real fee/staking yield: 21.2% · token emissions: 0% of the headline.
Break-even fact: a ±321% move in USDC-CBBTC erases a full year of the fees you actually keep (~21.2%). Whether that move happens is up to the market — but any emissions inflating the headline will fade regardless.
Source: DefiLlama. Verdict is a heuristic over public data, not financial advice.