It's not for you to judge whether a coin has potential or not. It's all up to market sentiment.
Just as ETH has ETC, ZEC needs something to counter balance, and ZCL does it quite well.
ZCL serves miners, hodlers, flippers, or whoever come across for whatever purpose they desire without any prejudice, like "ZEN has future. ZCL doesn't".
Having said that, I'd recommend you mind your own mining whatever pleases your purse.
BTW, it's "potential" not "potentisl". 7 yrs old can do better spelling than you do, and you are being judgemental?