Locking in a winning pick isn’t enough if the odds have already shifted....

https://wiki-canyon.win/index.php/Why_Do_F1_Odds_Change_So_Much_After_Practice_and_Qualifying%3F

Locking in a winning pick isn’t enough if the odds have already shifted. Imagine spotting a driver at +500, only to see that drop to +190 before you bet. Timing your move can be the difference between a big payday and a missed opportunity