These dynamic cards vary dramatically in price based on the performance of the player and team - and this year presumably depending on the country's and their own. It's evident through the price graphs available on FUT websites, which show that a star striker will rise in price prior to an event, only to skyrocket when they score or sink in a flash when the team goes behind.
The most effective way to make money out of cards is to purchase them in neutral periods keep them in your possession, and later sell them after the hype. For instance the Liverpool's Darwin Nunez has had a slow start as a player on Merseyside with two goals from the league in his first seven games.
After an ugly 3-3 draw in Brighton and with tough games on the horizon His OTW price - just three days post-release - is hovering at around 70k coins. A wily speculator might choose this low time to purchase one, and try to sell it before the next Liverpool game starts off, particularly when Nunez is in the squad. The more risk-averse investor might even keep it in the match in the hopes that Nunez scores, but the risk is far greater.
One thing you should look to look out for when purchasing OTW cards is that the upgrades are already priced in'. Everybody knows Man City are going to be able to win 3/8 games in order to earn Haaland his first OTW upgrade, for example, and that is part of the reason for his high in-game cost. Don't be fooled into buying players who are likely to win those three wins in hopes that they'll be able to increase their prices when the time arrives. Most likely, this could lead to a lot of players trying to cash in simultaneously, which will drive the cost down.
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