That's the big question everybody would like to know the answer to, but the truth is nobody knows what's the best to buy.
You have to base your choices on fundamentals you look our for such as vision, industry, team etc. but I personally look for new projects which I believe in to follow along their journey from the beginning. My favourite. At the moment is WONO which is a decentralised peer-to-peer marketplace for goods and services utilising the transparency, security and efficiency that blockchain and smart contract technology provide to improve the P2P experience (provide a layer of trust etc.) and I'm excited to see what wono can add to the P2P space.
In this type of market its important to find projects you're happy to follow for a while that you actually believe the vision of in terms of how they can change a space for the better. That's my two satoshis anyway. Otherwise I'd be going crazy about price all the time lol.