ETH in 2017 and ETH in 2021

In the crypto world, four years is a very important cycle, defined by Bitcoin's halving. Today, this cycle effect remains an important MEME in the crypto field and continues to influence people's decisions. Today we're talking about the changes in ETH under this four-year cycle. ETH is the native token of Ethereum, and ETH in 2017 versus ETH in 2021 is undergoing qualitative changes. From Planting to Harvest 2017 Ethereum Basically had no substantial ecosystem. In 2017, what made Ethereum hot was Initial Coin Offering. The main use case of Ethereum at that time was ICO fundraising.