The relationship between Bitcoin and altcoins can be complex and is influenced by various factors. While it's true that many altcoins tend to follow Bitcoin's price movements, this doesn't necessarily mean that they are all controlled. It's possible that they are simply affected by similar market forces, such as changes in investor sentiment, news events, and macroeconomic trends. Additionally, some altcoins may have unique features or use cases that set them apart from Bitcoin and can impact their price movements differently. Overall, the relationship between Bitcoin and altcoins is nuanced and influenced by a variety of factors.