Taking the entire alt coin range into the thought, only narrowing the list to those that on exchange listed, more than 98% of them are price valued under $1.  But, the changes in the price of Bitcoin have technically brought those up.  Most alt coins cannot be directly traded for FIAT, so the the value of coins like Bitcoin, Litecoin, Doge and a few others is important because that is the gateway out to FIAT from these alt coins.