Leveling up to 50 is the best way to make coins in Madden right now! You'll be able to make well over 1 million coins. This is a very time-consuming method and can be incredibly boring, however, it is also very beneficial to not having to spend a crazy amount on packs to get coins. The key is to buy the level packs in which the levels these are available are 11, 16, 21, 26, 31, 36, 41, 46.
After buying all of these which will cost around $20 you pick the quick sell players in each pack and quickly sell them. This will give you 760k coins alone, then add in all the rewards from the levels you will have nearly a million coins. Of course, a lot of websites offer cheap Madden 21 coins on sale, however, what I recommend is U4gm, already purchased several times, quite a pleasant experience.
Check it out below:
Step 1: Click on the "Challenges" in Madden Ultimate Team
Step 2: Click on "NFL Epics"
Step 3: Choose the first Larry Fitzgerald solo (that you must score a TD in)
Step 4: Set the difficulty to rookie and click play solo
Step 5: Put your fastest receiver on the left side of the field, and use the play Four Verticals
Step 6: Ideally throw the streak to the left side receiver every time for a quick touchdown
Step 7: After you complete the solo click "Replay Challenge"
Step 8: Do this repeatedly until you reach max level