These coins, just like many coins and various other currencies used in other games, can be earned in the game or purchased with real money by those who might be too lazy to farm. We suppose this shouldn’t really come as a surprise as microtransactions are a popular way for developers to earn money.
In fact Nintendo did tell us before that they will be exploring a variety of ways to price their games, and that games with microtransactions was a possibility, and like we said, it is a popular choice by many a developer so why not? It is unclear as to exactly how much it will cost gamers to purchase Miitomo coins, but we reckon it shouldn’t be overly expensive.
We know that there are many gamers out there who aren’t a fan of microtransactions. However hopefully these microtransactions are option, and that the overall experience for gamers won’t be affected even if they choose not to spend real money on items. In the meantime gamers who are interested can sign up and be notified when the game is released.