So it wasn’t. I just remember the laughing being because of how the treasure connected to everything he and his crew learned.
TBH, I think the story and Oda have set things up to where we the audience first see the treasure when Luffy does. I just say this because Whitebeard’s speech was done when Luffy was knocked out/rendered comatose after Ace died, along with the fact Luffy and Robin both said no to the chance to learn about their respective end goals when they had the chance with Rayleigh.
We may be close to seeing the treasure, but I doubt we’re going to see it thanks to Vegapunk. Most I can think of is how Joy Boy got the treasure to where it is, and maybe why people would go after it if they knew what it really was. Hell, Vegapunk may not even know about what the treasure is because he said he didn’t know some things and he wasn’t going to bother to try and fill in the blanks with speculation .
Was it ever established that any of the Straw Hats were paying attention to Vegapunk’s final broadcast?