Ok, so I guess the 20% is the maximum exposure then?  If starting price is $10,000 and you bet it to go up, you really can't profit if it goes higher than $12,000?

Similarly, if you bet it to go down, you can't profit even it it drops under $8,000?

So no incentive to keep pumping it up if it's at $12,000 but it really needs to be at that price at the close of trading if you bet it for 24 hours, and seems like the price opens at 6pm Eastern and closes at 4pm Eastern the following day?