They will all try to save themselves and testify against Trump. Always happens. Rudy too.
With regard to Rudy, I am sure you’re wrong. They’ll be wanting him to violate attorney-client privilege, and that he will not do. With regard to the others, I don’t know them well enough. It certainly does not happen every time, though weak characters like Cohen certainly folded fast. If it happened every time, then Trump would never have taken the oath of office, because already they were after that kid with the Greek name during the election in 2016. He was no fool, and no weak link, so he avoided their traps and kept his integrity.