Why don't banks buy XRP?

I'm puzzled about something. Given the increasing popularity and potential of cryptocurrencies, why haven't banks jumped on the bandwagon and started buying XRP? It's a highly liquid digital asset with a robust technology backbone, not to mention the potential for cross-border payments and other financial applications. It seems like a natural fit for banks seeking to modernize their services and tap into new revenue streams. So, what's the hold-up? Is it regulatory concerns? Technical challenges? Or maybe they're just not seeing the value in XRP the way we do? I'd love to hear your thoughts on this.