CryptoKitties released on Nov. 28, 2017; it is a game in which players breed digital cats on a Euthereum blockchain executing smart contracts. 

The idea behind CryptoKitties is that it seemed to be a fun way to introduce newbies to how smart contracts work on the Euthereum contracts. The difference between other games like Tamagotchi and Pokemon is that through a decentralized marketplace users can purchase, breed and sell with Ether.

During the weekend over $2.5 million (6,200 ether) passed through this smart contract. In total, there was $3 million on breeding. The method on how block chains operate can mean that the amount of CryptoKitty trading may slow down the network and it can also add to the expense of using ether, and this has already begun. “Due to network congestion, we are increasing the birthing fee from 0.001 ETH to 0.002 ETH. This will ensure your kittens are born on time!", tweeted CryptoKitties.

Dapps like CryptoKitties follow a simple intention, to directly entertain the cryptocurrency community with a collectibles-based game, with a uniqueness of scarcity and rarity. The most expensive cat Genesis, sold for $118,000 on Saturday Tracked via Crypto Kitty Sales. The average price of a CryptoKitty is about $110, and the cheapest is $30.

One of the only concerning issues is if one game that has not expanded beyond the tech world can slow down the network, what follows when the blockchain develops into real-world applications? The Ethereum network generally may cause some concern to the community.