Trying to sell some coins with high gains to buy some that has dipped alot, but it seems they all move up and down together for the most part. This makes it hard to sell. Is this how it normally is? Been trading just a month now.
You can use the graph in coinmarketcap as historical reference.
https://coinmarketcap.com/charts/You can see on the Percentage of Total Market Capitalization (Dominance) that there is some correlation between bitcoin price and alts, ethereum in particular.
Historically, if bitcoin falls, some alts like eth, does go up in value.
If both bitcoin and alts go down, you know that the money is flowing out -> to fiat.