The kid who created a memecoin and made $30,000 did so on the Ethereum platform, using smart contracts to launch the token. He used a common approach in the cryptocurrency space, creating a low-cost token, promoting it on social media and generating hype to attract investors. This type of project is often based on memes and popular trends, taking advantage of investor enthusiasm to increase the value of the token in a short period of time. The most famous example of this type of action was that of DogeCoin, but many other tokens have followed a similar pattern, with rapid creations and temporary success.