If you have a Binance account, you can easily top up your Funrise wallet with $USDC$ USDC via the Binance application or website.
How to Buy Cryptocurrency on Binance Homepage
Full instructions and tutorial video can be viewed here
Buy cryptocurrency via the Binance app
Let's walk through the process in detail.
Buy USDC with credit/debit card
How to Buy Crypto with Credit/Debit Card on Binance App (video)
To get started, select “Buy with card” from the home screen
Next, on Choose crypto page, type at search bar USDC
Enter the amount of the fiat currency you wish to spend
“Add a new card” or select the card you wish to use for the purchase and then tap “Confirm”.
Check the amount you wish to spend is correct, and then tap “Confirm” at the bottom of the screen.
Congratulations, the transaction is complete, and the purchased cryptocurrency has been deposited to your Binance Spot Wallet.
Buy USDC for cryptocurrency
If you don't have 
USDC in your account, you will need to convert or buy it.
On the home page, go to the search bar and type USDC.
You can buy USDC for USDT, BUSD, or other cryptocurrencies. Tap at pair that fits your balance and buy USDC as much as needed.
After the transaction, go to your wallet and tap on USDC.
On the USDC page, tap Withdraw.
In a withdrawal form, choose network Polygon.
Fill in the form. Funrise wallet address can be found on the Finance page.
Double-check details
Confirm your order and proceed to the verification page.
Once you have verified all, submit the transaction, and soon USDC will arrive at your Funrise wallet.