The $380 million superyacht, Moonrise, owned by WhatsApp co-founder Jan Koum, has been sighted off the coast of Mykonos, Greece. The vessel, measuring almost 100 meters in length, is currently anchored near the popular summer destination. Koum, a Ukrainian-born American billionaire, is known for his role in creating the widely used messaging application. The yacht’s arrival highlights Mykonos’ continued appeal as a hotspot for luxury tourism and large private yachts. Its presence is generating interest amidst the island’s busy summer season. No further details regarding the purpose of Koum’s visit or the length of the yacht’s stay have been released.