Do they really? I often encounter this statement. And i have no idea as to why. This past few days, bitcoin is on the rise and most certainly than not altcoin's price surely follows. I am not saying this is bad but altcoins have very little in common with bitcoin. And they are certainly not carbon copies of bitcoin either. Why the heck is their price so closely connected despite being so fundamentally different?
I also notice that altcoin or any other coins even eth follows the price direction of bitcoin. I wonder why then later on as I've read in threads some says it is because bitcoin is the leader so the eth and alts follows bitcoin, something like the alt and eth depends or is base to bitcoin. Another, others said that alts came from bitcon.