We have years of evidence of what Justin Sun intends to do and does. He lies to, he cheats, he obfuscates and he exploits others to make himself richer. He is a master of the crypto shell game and a bad actor.
Life is too short to waste a second working with or investing into people you can identify as bad actors or untrustworthy. This should be a lesson we have all learned repeatedly over the years. It never ends well.