Can you make money on Kryptomon

Yes absolutely, even when you play for free, buy or rent Kryptomon, but you have to take good care of your Kryptomon and win the battle.

What token can you earn in Kryptomon, what do you need?

The token you will get from the game is $KMON through different challenges such as Heroic Story Mode, PVP Ladder Rank Rewards, and Weekly Quest Rewards. If you're lucky you may even find a bag of KMON during the Pink Moon Treasure Hunt. To maximize the earning, you must buy or rent Kryptomon on the marketplace, since there is limited $KMON that can be obtained from using free Kryptomon and it is a bit difficult to win due to the level limit.

How to convert these tokens to other tokens.

Here's a guide. If you are looking to cash out some of your $KMON I highly recommend using PancakeSwap. This will allow you to exchange your KMON for other currencies like BNB, USDT, etc.

Are there any reason to hold on to the token rather than selling them?

Yes of course there is, reinvest $KMON to grow your Kryptomon party/strength, use for all premium transactions in the game such as loot boxes, tournament tickets, Power UPs, and forging armor.