Bitcoin is a digital gold standard and a store of value while Altcoin is to provide cases upon Bitcoin design
What do you mean by digital gold standard? Does Bitcoin look like gold to you? This is the result of learning from Google, you fail to understand what Bitcoin is. Bitcoin is bitcoin, gold is gold. Both are different. Bitcoin is decentralized, secure, limited supply, and gives freedom to its users. That is different compared to gold.
You better learn again about what Bitcoin is, because you fail to understand the most basic thing like this.
It's just how it is, many out there call BTC a digital gold and the discussions about it are going on and on, we've had enough threads to do it here, but - they do have some similarities, and people do like analogies, especially when they are not too knowledgable on the matter and they need something to compare this unknown concept for themselves.