Interactive Brokers for dummies

[Mustachioed]

Here’s what @Bojack wrote in a separate thread:

@Bojack

My logic is: all the instruments that I will hold there (VT, VTI, VXUS, you name it) are in USD. So I need USD to buy them. They will also pay out dividends in USD. It just seems easier to track everything in USD. Once retired, I will withdraw maybe PLN, maybe EUR, who knows.

I don’t think your base currency makes a difference when it comes to taxes.

If you invest only in US-domiciled funds, then I think it makes sense. But in the grand scheme of things, to Bojack’s point, it really doesn’t make a major difference and can be switched on the fly.