The Welshman hit a hat-trick on the weekend against Real Valladolid.
Coleman told Sky Sports News: "That's football. Last month after El Clasico he was under pressure, but a month later he is playing well and everyone realises what a good player he is and that's good news for everyone.
"His talent was never in doubt. He is a fantastic player - one of the top players on the planet.
"But he is the same player as last year. He will not all of a sudden do ridiculous things to warrant that price tag.
"He has to be himself, enjoy his football and keep playing the way he can and the way he has over the last two or three years.
"He is a super player, he is a great guy to work with and I think he is comfortable in Madrid, which is important and he is enjoying his football.
"Once he is doing that, with the ability Gareth Bale has got, only good things are going to happen."
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