Covered calls sell your upside for income
You earn premium now in exchange for capping gains above the strike. In sideways markets that is a strong yield; in a rally you leave money on the table. Compare simply holding on the HODL vs trade calculator.
Renting out coins you hold
A covered call is selling someone the right to buy your coins at a higher price, collecting premium now. Hold 1 BTC at $100k, sell a $110k call for $1,500: if BTC stays under $110k you keep the coin and the $1,500; above it, your BTC is sold at $110k — you still profit, but the moonshot went to the buyer.
The trade-off in one line: you're converting unlimited upside into fixed income. Selling monthly calls at 10% out-of-the-money might yield 1–2% a month in premium — real income in sideways markets, and precisely the strategy that underperforms catastrophically in the one big-rally month that crypto delivers a couple times a year.
The break-even mathematics favor sellers more in high-IV environments: crypto option premiums are fat because volatility is. Selling calls when IV is elevated (post-crash, pre-event) collects more rent for the same cap on upside. Selling them in calm, coiled markets is picking up pennies in front of the breakout.