Why would banks buy XRP?

I'm somewhat puzzled about the logic behind banks purchasing XRP. Given its volatile nature and the regulatory uncertainties surrounding cryptocurrencies, why would financial institutions, known for their conservatism, take such a risk? XRP, as a payment token, might offer speed and efficiency in cross-border transactions, but isn't that already achievable through existing systems like SWIFT? Or is it the hope of reducing costs that drives banks towards XRP? Could you elaborate on the economic incentives for banks to embrace this crypto asset?