I've seen some ICOs allow fiat purchases, so yes it is possible
But the fact that the majority of countries are considering about buying or making a direct transaction of cryptocurrency with fiat as illegal activity. That means if that was an unlawful act.
But where do people are buying altcoin directly?
Since the only possible thing to buy altcoin through the exchange site.
But those are accepting wire transaction have not made any cooperation with the bank itself.