Auction House is the best option for you to make a lot of coins. You must always pay attention to the Auction House because you will find the best deals there, which will help you make a lot of coins.

All you have to do is find good deals on the card and buy it. If you don't want to use cards for yourself, that's okay, nevertheless, get them. Pay attention to the cards that players sell at cheap prices, and then flip them to a higher price by buying.

If you don't get a good offer, just wait. You won't sell your credit card at a low price, because that will defeat the purpose of buying these credit cards. Go for a bargain and wait for them to flip.

This will allow you to make more coins, faster and cheaper than selling cards. Although don't lose yourself in this matter, go play a game.

You don't want to waste all your time at Auction House and miss those extra prizes by playing MUT.

For Madden 20 Coins:
http://www.vhpg.com/madden-mut-coins/