The arrival of a Liberian-flagged freighter with Ukrainian, Arab and Filipino sailors spells one thing for Elena—dollars. And greenbacks are king in Venezuela, the 32-year-old prostitute says.

Within hours of hearing of the ship’s imminent arrival, she has packed her bags and is heading to the crumbling city of Puerto Cabello. It is a 280-mile journey from her home in the Western state of Zulia that Elena finds herself doing more often now as Venezuela’s economy contracts, the bolivar slumps and prices soar.