TLDR of these dudes' awesome theory: Bonney has Toki's Fruit, the Time Fruit, which is why Oda's never revealed the name of her Fruit. The reason no one can catch Bonney is, like Toki, she'll jump forward into the future to escape (this is how she fled Akainu, Reverie, and why they found her randomly floating in the air outside of Egghead). In order to escape the destruction of Egghead, Bonney wi
Considering both Bon Kurei and Bartolomeo's Fruits were at first on Wano, and then managed to leave the country after their users died, Bonney getting Toki's Fruit is possible.
Kuma saved Luffy and his crew from Kizaru.
I think Luffy will save Bonney, Kuma's daughter, in Egghead, then like the video predicted, Bonney will save them with a time skip of a week or so.