Even in FIFA 18, you can not give away coins or transfer coins have a look at this simple fifa mobile guide for coins. Some offers on the net allow you to buy coins for money. But beware, because there is a lot to consider here:

• We generally advise against buying coins online. Although the temptation may be great, you risk jeopardizing your account through phishing.
• Also, refrain from making coin gifts on the transfer market where you sell cheap players at high prices to another account or friend you own. This violates the guidelines of EA and will be punished.
• The same goes for the in-game bots and auto-buyer tools that earn coins for you when you're not playing yourself.
• That you should not use hacks and cheats in FIFA 18 , should be clear, because it is punished by EA just as hard but you can use these fifa mobile cheats without any problem.