Crypto coins use the process of mining and the resulting blockchain as a physical measure of the currency. This is similar to how Reserve Banks used to have gold reserves that backed their fiat currencies.
Dow, the man who first shorted bitcoin, for instance, even mentioned in his initial post that a person can be “simultaneously bullish on blockchain and bearish on bitcoin.” And he just announced that he’s ending his short.

Given the hype and ironic humor around its release, the currency attracted a cult following among cryptocurrency enthusiasts. Undaunted, West’s legal team filed suit, compelling the creators to sell their holdings and shut down Coinye’s website.
Whitepaper. A startup or established company publishes a whitepaper to tell potential investors about its ICO, or Initial Coin Offering — the technical details, objectives of the product, information about the team behind the company, and other details.