IBRK recently started to ask you, if you are going to trade cryptocurrencies. If so, you can open an account with the US entity. See starting here: Buying crypto for Swiss residents [2023] - #65 by xerox5003
Edit: it seems, that the pros/cons are the same, as for UK and US. The only advantage is, you can trade stuff you normally need a KID (e.g. IBIT).