100% guarantee of years of uncertainty, so any large venture built on disposable income is a non starter. The Cruise Ship industry is precarious, and with a hanta virus outbreak on one ship pointing to just how shoddy the whole thing needs to be for profit, a surge of sick ships is likely. Fuel for planes and ships could cost much more, and then become unavailible in certain locations, which would be part of the recipie for a full crisis involving a sick ship or resort, some small country refusing (legitametly) a quarantiened ship, whatever scenario, the point is that running these huge tourist operations requires significant EXCESS capacity, not missing pieces and ultra slim margins.