system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: Every Cryptocurrency is a zero-sum game, meaning you can only “make money” when someone else loses money. That means it’s basically a scam, or (maybe) gambling.

Cryptocurrency isn’t an investment, because it doesn’t create anything of value. You’re just trading money with other people who sell early or at a bad time, or are the person on the receiving end of a pump & dump scam, which means you’re the bagholder.

For example, if 10 people buy a cryptocurrency for $10 each, then that means there is $100 in the system. If someone wants to sell, they may price it higher (to $11), but now the newest person is holding onto something that is priced at $1 more than it should be. And now that $11 holder has to convince someone else to buy it for $12, etc, etc.

Well, this example is a Ponzi-scheme (edit: or Pyramid scheme), because there isn’t enough money in the world to keep the price going up, and every time someone buys/sells, someone gains value/money and someone else  loses value/money. Meaning it all becomes a zero-sum game. 

Note: I am NOT talking about blockchain as a technology.

Edit: now getting DMs from people using ad hominems instead of actual arguments, guess I must be on to something. People get angry when you expose their scam.
gpt
All currency is a zero sum game. 

Excluding inflation for a second, the only way to acquire currency is for someone else to give it to you. 

Bringing Inflation back into it, if the supply of money goes up (someone gets money without someone giving any up) then the value of everyone else's currency goes down. 

Either way, it's still zero-sum.