First thing first:
you should grind so much killstreaks to do /collector and to sell the equipment lootboxes or you can use it to have a completed set of any type but of course don't overprize for a set unless it has speed II or speed III and also you can ask some friends for some balancing help if they have the space for it.
Second thing second:
You should join every *Luck of the sea* event but of course put on your inventory a fishing rod maybe with enchants or without any enchants and sell them at the *Fisherman* NPC to get more money and faster than asking people in chat to have it for their money.
Third thing third:
You as well should spend some money to get some op crate keys and as well you can use it to get an op item to overprice it as you like like an example: ultra , god , and reaper keys are the most op crate keys at the whole kitpvp server maybe if you want to sell them or use them to get more valuable items more than selling these keys.
Fourth thing fourth:
You should get some op sets to grind with otherwise immortals or celestials will abuse their kits on you and they can steal your stuff or do /sellhead after they do get your head after you have gotten murdered by them.
Last thing last:
If u want to keep your money with u , u should do /withdraw with the quantity of the balance u want to leave on ur player vault because so many people are stealing money from each other by selling their heads on /sellhead which it means your money can be taken easily so be careful with grinding while you are having ur balance with u.
I hope i have benefited u at these details of how can u get rich more faster in KitPvP
Have a great day!
AdhaM5.