A 20% decline may not be enough to justify the risks of owning Norwegian.It's been a comeback story for Norwegian Cruise Line Holdings (NCLH 1.70%). After facing near-extinction in the depths of the COVID-19 pandemic, the recovery of Norwegian, along with other cruise line stocks, accelerated in the past last year. Norwegian has taken advantage of pent-up travel demand, continued economic growth, and fleet upgrades to not only survive, but thrive, hitting all-time booking records in recent quarters. Shares ...