Our team at SDF is working to get more local companies (like US exchanges) involved, but it’s also something the community can help with.
You can help by writing to your favorite US-based exchange and asking them to become a Stellar gateway. Please do comment here if you end up trying this!
Stellar has had a USD Gateway since inception: https://coinexgateway.com/
Anthony Fox commented
I'd love to see SnapSwap onboard with Stellar.
@Sean Bennett There is already a Chinese gateway: RippleFox
Sean Bennett commented
Love to see a Chinese one too.
Sorely needed at this point.