MM Investment: Man U Golds
Player: Cheap Manchester United Golds (Bailly is just an example)
Reasoning: Each Thursday, EA releases Marquee Matchups. This week, there is a good chance that Liverpool v. Manchester United (see predictions here) will be chosen. If requirements hit, this would cause players from Manchester United to go up.
Regardless, I anticipate these players to rise in the hype leading up to Thursday.
While you can invest in silvers/bronzes as well, gold cards are better as they discard for more (particularly gold rare cards). See the full list of quick sell values here.
Target BUY: XBOX 750 coins or less. PS4 750 coins or less. PC 750 coins or less.*
*Squad battle rewards should be a good opportunity to get them at these prices.
Target SELL: Marquee Matchups come out on Thursday at 6pm UK time. Sell in the hype beforehand or gamble and hold in hopes the requirements cause them to rise. Personally, I would sell in the hype.