curl --request GET \
  --url https://api.copper.co/platform/currencies

{
  "currencies": [
    {
      "currency": "<string>",
      "mainCurrency": "<string>",
      "name": "<string>",
      "confirmations": "<string>",
      "crossChainNetworks": [
        "<string>"
      ],
      "decimal": "<string>",
      "extra": {},
      "fiat": true,
      "networkName": "<string>",
      "protocol": "<string>",
      "stableCoin": true,
      "tags": [
        "deposit-custody"
      ]
    }
  ]
}