1) Ripple, the company, offers banks a software called Ripple Connect (thanks /u/cmbartley) which uses InterLedger Protocol (ILP) to transfer $$ between banks with a minimal fee because it doesn't have to get transferred 2-3 times into different fiats or service fees. It simply needs to get converted once. This software DOES NOT USE XRP. XRP is an option but right now banks are not choosing it because it's new and because of its volatility.
2) XRP is a cryptocurrency that exists outside of Ripple Connect that is high in liquidity and has fast transactions. Source: https://youtu.be/51dMe_Oui4M?t=2439
If XRP exists in a different system, I wonder what will prevent it from plummeting in the future.