There is no one definitive answer to this question as there are a few different ways that you can acquire Vbucks within the game of Fortnite. The most common and straightforward method is to simply purchase them with real money through the in-game store, which offers various amounts of Vbucks for sale at different prices depending on how many you want to buy. Another way to earn Vbucks is by completing certain challenges and objectives within the game itself, which will often reward players with a small amount of Vbucks upon completion. Finally, another (albeit less reliable) method of acquiring Vbucks is through opening Loot Llamas, which are special containers that can be found throughout the Fortnite map and occasionally contain a handful of Vbucks inside.