Bitcoin is the ONLY decentralized crypto currency and ALL the other shitcoins are just following the trend of the bitcoin.
when bitcoin goes up all the other coins are going up and when bitcoin is crashing all the market is crashing.
The bitcoin has no CEO or developers that are being payed by the bitcoin company ALL the other coins have a CEO and a company that stands behind them, and if the CEO will die tomorrow in a car crash - you will see the coin loosing 60% of it's value in one day. It has happened to Ethereum last year when someone said that Vitalic B died in a car crash.

check the definition of Ponzi Scheme - https://en.wikipedia.org/wiki/Ponzi_scheme