In Chapter 1103, Saturn discloses to Bonney that her unique abilities stem from experiments conducted on her during childhood. According to Saturn, the user of the Hito Hito no Mi can freely transform as desired into the foreseeable future. However, the efficacy of these abilities diminishes significantly when the user lacks accurate knowledge about the future.
Based on this revelation, my theory suggests that as the One Piece series unfolds, Saturn or possibly Kuma may unveil the true identity of Nika, indicating that Luffy is indeed Nika. Since Luffy himself is unaware of this, Bonney would need to accept this revelation and believe it. Furthermore, she would need Luffy to teach her everything about Gear 3 or 5.
By assimilating this knowledge imparted by Luffy and embracing the belief, Bonney could potentially achieve mastery over the distorted future. This mastery may manifest in her awakening the powers of Gear 3 or 5 for an extended duration. However, it's important to note that while she can copy the fruit powers, her version of Gear 3 or 5 may not be as potent and effective as Luffy's due to the difference in their Conqueror's Haki levels.
~Theory & Speculation
In Chapter 1103, Saturn unveils to Bonney the origin of her unique abilities, linked to experiments conducted during her childhood. The Hito Hito no Mi grants her the power to transform at will into the foreseeable future, contingent on accurate knowledge. A theory emerges that as the series progresses, Saturn or Kuma might reveal Luffy as Nika to Bonney. To unlock the full potential of her abilities, Bonney would need to accept this revelation, believe in it, and have Luffy teach her about Gear 3 or 5. The theory speculates that mastering this knowledge could lead Bonney to awaken Gear 3 or 5 using her distorted future, albeit with differences due to the absence of Luffy's Conqueror's Haki.