I've honestly never known a player to want to use a bank in D&D. Seems a bit too dry and simulationist, I guess? We just convert coin to gems when we need to lighten the load. And, of course, real estate, vehicles, servants, etc.
Carrying around large amounts of cash can be dangerous, yes, but that's all part of the fun!
Carrying around large amounts of cash can be dangerous, yes, but that's all part of the fun!