While cryptocurrencies have exploded in value, so has this sub-genre that mimicks real-world assets like the US dollar.
Financial regulators are increasingly concerned about stablecoins, a type of cryptocurrency tied to an asset like the US dollar.
Operators like BlockFi and Nexo offer rates that are north of 9%.
With Wall Street slowly taking charge of crypto, the days of radical outsiders launching successful altcoins may be numbered.