the future of cryptocurrency depends on Bitcoin because if the value of Bitcoin gets higher then the future of cryptocurrency will be brighter and crypto users will increase. so far what makes cryptocurrency increasingly popular is because of Bitcoin.
Well, I agree that bitcoin is indeed a key for cryptocurrency to grow because even today many people who use bitcoin are the most important thing for the cryptocurrency sector.
many think that bitcoin is the leader of other coins, so the movement of bitcoin becomes a reference for the movement of other coins. we can see when bitcoin is green, then other coins follow it and vice versa. this happens because many other coin transactions involve bitcoin, because they cannot be separated from btc