Stocks seem to work well enough. There's no way to control price to USD, but you can control tokens to metrics. To use bitcoin as an example, say I'm holding 1

Stocks seem to work well enough. There's no way to control price to USD, but you can control tokens to metrics. To use bitcoin as an example, say I'm holding 1 bitcoin and the metrics go up n. That coin pops out x satoshi. Metrics go down n and I lose x satoshi. Anyway, I clearly have no idea how it would work. But it clearly can work; people are willing to find these tokens valuable.