@NewUser35725 if you cut your losses and sell, then buy more players with that reduced money who then drop as well, are you going to cut your losses and sell those as well?
Not having a dig at you here, as I understand it is a bit scary when you put a decent amount of cash in and you are in the red early doors.
However, i can't repeat enough, people need to stop shitting themselves when their players fall a few pence. The market will fluctuate on an hourly basis. Think about why you bought the player in the first place. You must have thought he was worth buying or you wouldn't have bought him. If a player has one bad game then he's always likely to fall in price but if he then has a good game the week after then he's always likely to rise again and you'll be back in the green.
I'm not suggesting you should keep all players at all costs. Ive held players for far too long myself and regretted it but have confidence in your football knowledge, have some patience and remember that you are only losing money if you sell a player you have in the red. In 12 months time he could be worth ten times what he's worth now but it won't happen overnight. This isn't like accumulator betting where £5 turns into £300 in an afternoon. You have to take your time and rewards are far more worth it.