What about Ethereum? The circulating supply is around 118,000,000, and there’s no cap on how many Ether can exist. But Ethereum’s net emissions were recently adjusted via a burn mechanism so that it would reach a stable supply, or potentially even be deflationary, resulting in somewhere between 100-120m tokens total. Given that, we shouldn’t expect... See more

Let’s start on the supply side since it’s a little easier to understand. The main thing you’re trying to figure out is:

That means 90% of the supply is already in circulation, and here will only be 10.5% more bitcoin 100 years from now, so you shouldn’t expect any serious inflationary pressure bringing down the value of the coin. 

ROI in this case is not how much you think the token price will go up. It’s how much income or cash flow the token is able to generate for you simply by holding it.

On the supply side, a token will increase in value if fewer of those tokens exist—we call that deflation. A token will decrease in value if more of them exist—that’s inflation. When you’re evaluating the supply side you don’t have to worry about things like whether the token has any utility, or whether it will generate income for its holders. You’r... See more

Some tokens allow you to tap into the earnings of the protocol they represent. If you hold SUSHI, you can stake it to earn a share of the Sushi protocol revenues, currently for about a 10.5% APR.

So while it’s tempting to be purely analytical, don’t discount how far a token can get with faith, clever memes, and a cult-like following. 

The last thing you want to consider with supply is allocation. Do a few investors hold a ton of the tokens which are going to be unlocked soon? Did the protocol give most of its tokens to the community? How fair does the distribution seem? If a bunch of investors have 25% of the supply and those tokens will unlock in a month, you might hesitate bef... See more

By reading the docs or whitepaper, you should get a good sense of how the supply is going to be managed, and what forces will drive demand for the token or cryptocurrency.