Well, everything in the economy is a ponzi scheme in a loose sense of the word. The real question is whether it provides a value that allows its price to be set

Well, everything in the economy is a ponzi scheme in a loose sense of the word. The real question is whether it provides a value that allows its price to be set on a market. A classic ponzi scheme has no value beyond its commitment to yield a return. There are several arguments for why crypto might have a priceable value, and one has to decide if they're persuasive. I think the comparison to gold isn't actually that bad for a coin with a predicable increase in supply, like doge.