If your requirements are limited to payment, then checkout the aztec protolc and specifically their implementation of a zero knowledge wrapper for dai. With this your users can transact privately, safely, and with stability, as Dai is a decentralized USD pegged stablecoin. If your purpose isn't focused around payments, then definitely look into Zokrates for implementing more application specific zksnarks.

If your requirements are limited to payment, then checkout the aztec protocol and specifically their implementation of a zero knowledge wrapper for dai. With this your users can transact privately, safely, and with stability, as Dai is a decentralized USD pegged stablecoin. If your purpose isn't focused around payments, then definitely look into Zokrates for implementing more application specific zksnarks.