BTC officially launched mainnet in 2009, but as early as 1990, someone had already created an electronic currency called Ecash. Over the next 20 years, a series of experimental projects, such as B-money and Bitcoin Gold, were continuously developed until Satoshi Nakamoto finally brought them all together and launched Bitcoin. Throughout the entire process, no one mentioned the concept of "blockchain," not even Satoshi Nakamoto in the BTC white paper. The core goal of our forefathers has always been singular: Create a free currency