AXS? the Axie Infinity game? you need Ethereum for purchasing and to start the game. If you want to multiply your pets, you need that coin for them to mate.
But you're right that it's a good way to generate income as it's profitable just as the other games that offers the same entertainment but lesser in profitability.
But don't you think this is also temporary? Right now AXS seems populair and it is getting pumped but soon the next hype will occur. Look at Alienworlds. At some moment, it reached a price of 6.6$ and now its value is only 0.26$. Investing is these kind of coins is too risky for me.