When playing I’m never thinking about my economy, it’s always just is the gun I’m buying good enough to make me have an impact this round and if I say no then I save. What do you think?
you have to weigh up your possible impact in the round against your impact in the following round given the money you'd have then. sure you can force a sheriff light armour after losing pistol and get two kills, but that means you can't buy round 3 where its actually more important for you to get impact with a rifle
tldr economy does matter you cant just play for the round you're currently in
It depends what rank you are, but if you're like plat or higher then yeah it matters quite a bit. You should always sync your buys with your teammates.
And if you don't then there should be some kind of plan around it. for example if you're gonna hero buy tell your teammates to follow or trade you so they can pick it up and put it to use if you die.