i can unerstand when price of one crypto increase or decrease , but why when it's bear or bull market all cryptos (or 90% of them ) goes up and down and follow a general trend ??
is poeple invest +- equally in different cryptos or just because market follow the top 3 cryto and mainly bitcoin ??
The price and circulating supply! Someone has to sell at a price someone has to buy, that's how price changes. Coin price * number of coins = Market cap.