I have a trust (several, actually), and I still know better that it is permitted to exist in its current incarnation, not a perpetual, immutable right or iron clad guarantee.
They will do the exact opposite - triple down, take this new enormous opportunity and develop hundreds of new ways to offer US people safe haven for their assets. Thousands upon thousands of new startup consultancies charging just few % fees will be founded and every wealthy person in the US will have to turn off their phones and stop checking the inbox because of all that cold calling and emailing these people will do.
Major corporations can’t withstand minor ransomware operators. What makes you think these jurisdictions can withstand superpower nation state efforts?
TLDR good luck, have fun.