Is there any relationship between the two?
Whh must the fall of bitcoin after other altcoins?
Both Altcoin and bitcoin are in the same market and both are crypto currencies, and there will always be a connection between the two.
But actually this has not been proven in a real / scientific way. But if you look at the habits of the market during the last few years, it can be said that bitcoin prices will become a reference and affect the price of another coin.
Yes, bitcoin price has the influence in the market because most of the time when bitcoin goes down, prices of other coins goes down as well. When bitcoin is red, almost the entire market is red and when bitcoin is green, almost the entire market is green. Its price has a big influence in it because some people would then sell their coins when bitcoin goes down because they knew that price of altcoins goes down along with it. This has been the trend and it continues up to now. I think it has something to do as well for bitcoin to be a base coin that's why it has the effects of its price to altcoins.
for these two coins into a coin unity that generates substantial profits going forward. with a growing ability that generates support for the advancement of future coins against the Cryptocurrency market and substantial profits going forward. so to progress coins will greatly help the development of Cryptocurrency. so they become a unit of coins that makes BItcoin go down and Altcoin follows.