Credit Suisse would not be interested in you unless you have a minimum portfolio of $1 million dollars... and their fees are shockingly high... for a basic accoutn, annual fees are about $10,000.00. They are designed primarily for people who don't mind paying a small premium to HIDE their money (ill gotten gains perhaps? embezzled funds by some third-world despot? overthrown dictator of small African/South American country?)
I would suggest you just pay your taxes like everyone else, saves you the headache.