Yes, in a sense. Other players might take credit for things you've done in the game, like finding a valuable treasure or completing a difficult quest first. They could brag about it as if it were their own accomplishment, which is like stealing your story.
Well, not really. While players can hear about your story, the concept of 'stealing' is a bit different in Sea of Thieves. Each player's journey is their own, and just because someone else hears about your cool encounter with a skeleton ship doesn't mean they can steal the actual experience from you. It's more about the personal memories and skills you gain during your playtime.
The 'Sea of Thieves: Stars of a Thief' is likely an aspect within the 'Sea of Thieves' game. It might be a quest line or a part of the game's lore. Since it's described as 'elusive', it could be something that's not easily found or fully understood by players right away.