Ethereum as oil comparison

I am new to crypto and have done some reseach and found the comparison of Bitcoin to gold and ETH to oil. So I understand that gold stores value and bitcoin does, too. But if ETH is oil, how does buying it and holding can increase the value? No one stores oil…. If I buy ETH now and just hold is like buying and holding oil…. How can we, the retail investors, can make money with ETH? Is it only by Staking? Like oil production companies? Or any other ways to profit? If feels that just holding will not bring much value or I am missing that part… Can someone please explain? Thanks