As said previously, a covered call is selling options on the underlying while holding it (the underlying can be anything: equity, fixed income, commodities, etc.).
By doing so, you sell the volatility implied in the price of the option and hope that the realised volatility will not be higher. Most of the time this is true: implied vol > realised vol. This is why "selling volatility" is a popular trading strategy.
However, when you have very sharp price movements, it will be painful.
Technically when you sell an option (naked = without holding the underlying), your losses are unlimited (a quant would even add that markets being nonergodic, selling can only lead to misery)
Currently, for most markets, the volatilility is very low, meaning you sell low implied vol vs (even lower) realised vol.
If you think the macro conditions (excess liquidity, low vol due to concentration on few(er) assets, etc...) that explain why vol is so low will continue, you should continue selling options (or buy your Covered call ETF that does exactly the same thing for retail investors).
If not (i.e. you assume realised vol will at some point increase or mean-revert, you believe there might be some hidden cracks in the financial system...), this strategy is not for you.
In a covered call strategy you also own the underlying. so this limits the downside risk.
Whatever your own risk tolerance, market outlook and investment goals, just make sure you understand the basic idea that there is an asymmetrical risk profile between selling and buying options.