Selling cash-secured puts that are significantly out of the money can be a more conservative approach than purchasing long shares, and can thus be a way of supplementing a comparatively large position in long shares. The most likely scenario is that the puts never get exercised and you keep the option premium, which should hopefully be quite a bit more generous than interest on a CD or bond. If the puts do get exercised, then you buy the stock at a significant discount below what you would have otherwise paid in the beginning for long shares. The stock may go lower still, but if you're a believer in the future of the company, then that should be tolerable. If the stock runs up quickly, then you at least get the benefit of being able to close out the puts early, at low cost.Tax implications aside, this should be no more stressful than watching the stock skyrocket while you’ve chosen to tie up your buying power with short puts rather than long shares. That is the equivalent scenario.
Take, for example, the TSLA June 2020 $150 put, which could have been sold 25 days ago for an $11/share premium when TSLA was trading in the low $240s. Selling a single put would have effectively tied up about $13900 cash (or equivalent amount of margin), with a return of $1100 over about nine months assuming no exercise. It's undoubtedly riskier than a CD or Treasury, but with a significantly greater return (about 10.5% APY vs. maybe 2% for a CD). The worst case scenario is owning 100 more TSLA shares instead of that cash. If TSLA runs up quickly and you exit the put early, then the effective APY is much higher. That June 2020 $150 put is now trading around $7.35/share, so buying back the put today would have made for an effective APY of about 45% on that $13900 cash.
About 25 days ago, at $243/share, $13900 could have been used to buy 57.2 shares of TSLA. Today, at $258/share, those shares would be worth $14758. Obviously, that's more than double the gains from selling/buying the June 2020 $150 put, but the risk would have been significantly greater. If the share price were to drop to, say, $180 then the put could still be held to expiration, still with an effective APY of 10.5%.
Also, in general, some investors have found TSLA to be a good stock for selling puts because they believe that the stock is undervalued, the risk is overstated, and there is no shortage of people who want to effectively short TSLA (or hedge their long positions) by purchasing puts. This tends to drive up the option premiums relative to the actual risk.