why does the price of Bitcoin influence other coins

[AakZaki]

One of the reasons I have today is that altcoin exist because of bitcoin and without bitcoin altcoin probably wouldn't exist. Bitcoin is one of the most numerous trading pairs for altcoin on the market other than USDT or other altcoin pairs that when the bitcoin price fluctuates ^{[up or down]} the altcoin price is also affected.

People say bitcoin is an altcoin role model where price movements will also be a role model to determine the best moment to buy or sell altcoin. At least bitcoin fundamentals will be taken advantage of by people who like to trade altcoin all the time. That's my simple reason why altcoin continue to be affected by bitcoin's volatility and probably most traders already know that.

Of course most traders already know it and Bitcoin is the main benchmark before trading on altcoins. Bitcoin is the backbone of cryptocurrency as described by the OP.
Bitcoin became the beginning of everything, so everything is based on bitcoin or depends on bitcoin.

[qwertyup23]

I really want to know why any time Bitcoin increases or go high many other coins will go high too and when Bitcoins drops many coins drops too.
 is it that Bitcoin is the backbone of other coins or their is something connected between Bitcoin and other coins.

please I need explanation.

There is a reason on why alternate coins are called "altcoins" because they simply derive their existence on the foundation that BTC built.

Lots of altcoins are present in the market- whether memecoins or usable coins. The latter are the types where they simply took the technology of BTC but they introduced improvements therein. The former are the ones that derive their value based on influence and hype- where its value is totally dependent on supply and demand (ie dogecoin influenced by Elon Musk).
 
One of the many reasons on why the price of BTC influence these altcoins is because they derive their value somehow on how BTC is performing in the market. That is also the reason on why BTC has the highest price of all altcoins present in the market.

[romeitaly]

Bitcoin is the first discovered cryptocurrency, that is why it is called the crypto king according to some replies here in the thread. Bitcoin dominance is the one of the reason why some altcoins are following the trend of bitcoin, and also some whales are depending on the movement of bitcoin that is why some of their holdings are being withdrawn due to the movement of the bitcoin

[galambo]

There is a reason on why alternate coins are called "altcoins" because they simply derive their existence on the foundation that BTC built.

Lots of altcoins are present in the market- whether memecoins or usable coins. The latter are the types where they simply took the technology of BTC but they introduced improvements therein. The former are the ones that derive their value based on influence and hype- where its value is totally dependent on supply and demand (ie dogecoin influenced by Elon Musk).
 
One of the many reasons on why the price of BTC influence these altcoins is because they derive their value somehow on how BTC is performing in the market. That is also the reason on why BTC has the highest price of all altcoins present in the market.

Though there are thousands of alt coins in crypto market only few top 10 or 20 are capable of being declared as alt coins that are worthy for investment rest are just shit coins (that's my own opinion). Crypto market is dependent on bitcoin for price and there is only one major reason for that i.e. BTC is the founding father of this market and there is no other alt coin till date which can match BTC security and decentralization nature.