Also the EU has setup a working Starlink competitor (by approving the feature on "old" satellites), and China is already doing launches and theirs should be at least partially operational. Russia claims to have a working Starlink competitor and India is building one.
Oh and as for profitability ... not that Starlink hasn't been tried 10 times before, with the most spectacular crash being Iridium, but that was far from the only attempt+bankruptcy building Space internet. Well, the economics are discussed in this video:
https://www.youtube.com/watch?v=zaUCDZ9d09Y
TLDR: SpaceX is bankrupt, Starlink is a pets.com "We lose on every sale but make it up on volume" style move. So yes, high time to sell the stock indeed.
Oh, and Blue Origin has beat SpaceX to Mars and will be the first private company getting a payload to Mars soon (the "ESCAPADE" mission). As in payload is on the way and there's no way SpaceX can catch up anymore. In fact it's pretty tough finding another rocket manufacturer that has not launched a mission to Mars. Boeing has launched payloads to Mars. Blue origin has. Arianespace has. Russia has. Not especially economically relevant* but worth mentioning. Economics are not what determines either rocket building or launches and hasn't ever done so. Which means rocket launches are cheaper than they can be in private hands.
* what is economically relevant though is that SpaceX is not even saving the US government money. The US government cannot risk having SpaceX as a single option to get to orbit, so it has no choice developing a publicly funded rocket program. Everyone always makes the point that SpaceX is cheaper than SLS. However ... this fails to correctly compare prices for the only options the US government has:
Option 1: pay for SLS
Option 2: pay for SLS and SpaceX.
So really the price of SpaceX rocket launches doesn't even matter, not using SpaceX will be the cheapest option because math.