Things to watch with cruise lines (and airlines). The revenue they are missing is going to a hole never to be seen again. If everything magically returns to normal in 3 months and every ship is fully booked, those people dont "spend double" so they cant be counted on to make up "lost" revenue.
If you want exposure to cruise lines, I would suggest buying long-dated out of the money call options. If the trade goes belly up, the dollar risk is much less vs buying the stocks. If the trade hits, you make money and can buy at a discount if the stock goes beyond the strike and you execute. This way hedges some risk by using options.
Disclaimer: I am long deep oom calls on RCL for Jan '21. I am look at a horrid 3 months and then 6 months for the stock to appreciate. Also hoping for a big market pump if Trump wins in Nov.