Metaculus is reputation based, not real money. They have a market for coronavirus, https://www.metaculus.com/questions/3529/how-many-human-infections-of-the-201

Metaculus is reputation based, not real money. They have a market for coronavirus, https://www.metaculus.com/questions/3529/how-many-human-infections-of-the-2019-novel-coronavirus-2019-ncov-will-be-estimated-to-have-occurred-before-2021-question-two/ https://www.metaculus.com/questions/3529/how-many-human-infe... Currently has a 3% chance of infecting more than 1 billion and 50% chance of infecting more than by 865k by 2021