Trade for survival, a Merchant's way of wining in this crazy world

I was just a normal guy so why did I end up in this fucked up world that seems to want to get destroyed? Fuck, whatever, even if the world wants to get fucked up I will not let it. At least I have a little something to help me do it. Trade, sell, buy, this world or others, I have a deal just for you. (Merchant CYOA Essence, Progressively OP, Harem, gray MC)