Getting USDC on Polygon

All trading on 4rho is denominated in USDC on Polygon. There are several ways to get it; the easiest sits inside 4rho itself.

From inside 4rho (recommended)

Open the wallet menu and tap Add money. We hand off to Coinbase to take a card or bank payment in your local currency, and the USDC arrives in your Polygon wallet a minute or two later. The flow lives in Add money.

There's no 4rho fee on this. Coinbase charges its standard onramp fee, which is shown before you confirm.

From an exchange

If you already hold USDC on Coinbase, Binance, Kraken, or another exchange, withdraw it to your 4rho address with the network set to Polygon.

Common mistake: withdrawing on the wrong network (e.g., Ethereum mainnet). The token symbol USDC is the same across networks, but USDC on Ethereum and USDC on Polygon are different tokens at different addresses. Always pick Polygon as the withdrawal network. Funds sent on the wrong network may not be recoverable.

From another wallet on Polygon

Send USDC from any Polygon wallet (MetaMask, Coinbase Wallet, etc.) to your 4rho address using a normal token transfer. No bridge needed.

Bridging from Ethereum

If your USDC is on Ethereum mainnet, you'll need to bridge it. The official Polygon Portal (https://portal.polygon.technology) is the canonical bridge. Bridging takes a few minutes and costs Ethereum gas.

Quick decision tree:

• USDC already on Polygon → just send it.
• USDC on an exchange → withdraw with network set to Polygon.
• USDC on Ethereum → bridge via Polygon Portal, then send.
• No USDC anywhere → Add money inside 4rho via Coinbase.

You'll also need a little POL

POL (formerly MATIC) is Polygon's native token, used to pay network fees. Most users never think about it because gas is auto-managed and costs less than a cent per transaction. See Gas fees and POL if you ever run low.