IOTA
Hedera
Quant
Algorand
XDC
Ripple (XRP)
Stellar
Given that this new international payments financial system is set to replace the existing international payments financial system, the volume of transactions this new system will handle will be unlike anything the cryptocurrency space has ever seen.
If all international payments are put through these few (ISO 20022 compliant) cryptocurrencies, the sheer volume of transactions could boost both the market capitalization and market value of these cryptos considerably.