What game / game items are worth to play and collect items and then sell?

hey guys, i am really interested what game is profitable in 2018/2019 range.
What is the most popular game in your country? what type of items are skyrocketing and what accounts cost high amount of money?
its not a big of a surprise that many kids and adults are making money from simple games, so lets just discuss this matter! cheers

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Games that I think you should check out, If you're into things such as Tower Defense games I offer a 3D Tower defense with a great customization, Dungeon Defenders - Only Dungeon Defenders 1 as there is a small community still playing but its very helpful, You should check this game out because I've put over 250 hours into it and its still extremely fun completing the game a few times and all the challenges. Second game I reccomend checking out is RWBY Grimm Eclipse, This game is an anime game but its extremely fun with 8 characters that you can play and level up constantly, The only downfall is that the game is quite short and you just keep repeating it over and over again which can get quite boring. And thats really all I play currently.

I have a feeling that CSGO would probably be a good bet. There are a lot of people who trade and sell skins for guns in the game.

game item are virtual isnt it? or vacant, thats mean is has no value untill someone else give it to it. so find a item you your self would by and predict the buying price, then buy it

thanks for all this answers, yeah csgo seems more profitable.

Elite Dangerous, World of Tanks also worth a try if you have a LOOOOOT of time.
Basically from a point of view these are way too grindy games and if you want to enjoy most of their parts, it can be a good idea not to start from zero.