Is SpaceX is a comparatively 'safe' short, as its downside risk of 4x 5x 6x is so unlikely?

I'm very much not a short seller and not experienced with it.

But isn't the chance of SpaceX going to 3x or 6x so unlikely (as it would make the market cap so astronomically stupid and huge), so it would effectively limit your downside risk? Its not going to 10 Trillion is it.

Seems to me that the limited max price, plus the already crazy valuation, make it a much safer short than the average stock.