A pair of Sir Elton John’s signature high-heeled boots. … Jimmy Hendrix’s Flying V guitar. One of Madonna’s bustiers. A bevy of pick-chipped six-strings previously owned by rock legends like Bob Dylan and Eric Clapton — and one American Indian tribe owns them all. The Seminole Tribe of Florida, who some analysts say are worth several billion dollars, have become the first American Indian tribe to also be considered a bullish corporation...