NFTMex BTC Reds are a guess on the weekly close being "DOWN".

How it works:

NFTMex BTC Green & Red NFTs are a game of guessing the result of each weekly close of BTC/USD. Holding/Trading greens/reds is a guess at whether we are Up or Down for that week, by the close of weekly trading. (Sunday, 8pm EST)

Upon the close of each trading week the result (Up/Down for the week) will be recorded along with the addresses of the top five holders of the winning side, and the top five traders (in volume) of the winning side.

Once OpenSea pays out royalties, distribution for each week's winners will go out to those addresses - so you can sell once it is recorded at close & still win as a "holder", just so long as you still have access to the address.