The question is what would YOU consider overpriced?
I sell calls on stocks that I own where I think that the combination of the premium collected and appreciation over the price I paid is an excellent return. Do I lose out sometimes by missing some additional appreciation? Yes. Did I realize my investment objective with the stock? Mostly yes (unless I bought it for the dividend, but then the locked-in appreciation should cover that for a while, and another opportunity will come down the road to deploy the cash). Sometimes I will just sell calls against a portion of my position, just to generate some extra income.
I'm a value investor, but I can price in growth. What I call overpriced is if the price already factors in the bullish case and still has an expensive P/E. Eg. if a stock is at 1000 P/E, and I'm bullish and believe earnings will grow 10x which would bring it to 100 P/E, I would say it's expensive. I haven't had time to follow the streaming industry or VIAC, so not sure where the bullish case would price it at.
Re: calls, I've never used calls so it's above my pay grade to do it right. I would probably just sell a portion of the shares.