Previously, mainstream currencies were LTC, ETH, BCH, etc., divided into mainstream and counterfeit based on large market capitalization. There will only be two mainstream currencies in the future. One is BTC, which is definitely the top 1. Any positive news for cryptocurrency is also positive news for Bitcoin. Another type is stablecoins such as USD, USDT, and USDC, which are tokens issued by the US government as the actual project party and agent. Other VC coins, meme coins, and platform coins are all called version coins, with one version, one story, and one batch of tokens.