The seven best altcoins to buy now are ETH, DOT, LINK, SOL, AVAX, ADA, and ATOM. These altcoins are all well-established projects with strong fundamentals and the potential to grow significantly in the next bull run. They are also all working on innovative technologies that could have a major impact on the blockchain industry. When investing in altcoins, it is important to do your own research and understand the risks involved. The crypto market is volatile and unpredictable, so investors should only invest what they can afford to lose.