Firstly private bankers are out there to milk money out of you. They dont care on your tax situation; they’ll simply tell you to consult your own tax consultant. They could care less whether your portfolio makes money. They will sell funds/investments/insurance that will lend them the highest commissions. They are not keen if you buy individual stocks as they earn minimal commissions. Investing through IBKR will be a better investment decision than becoming private banking clients.
Ever heard that Warren Buffett pays a lot less taxes than his secretary? He’s been postponing paying taxes by sticking to his investments for a long time. Long term holding also will net you qualified dividend which are tax less than ordinary income.