Context is important :) He was talking specifically to and about day-traders:

"We have no interest in satisfying the desires of day traders. I couldn't care less. Please sell our stock and don't buy it."

Not that I'm a big fan of Musk, but even somebody as mild mannered as Tim Cook has said things like this in the past:

"If you want me to do things only for ROI reasons, you should get out of this stock."

https://www.cultofmac.com/268413/tim-cook-tells-profit-obses...