With Saudi Arabia doing an IPO on their largest oil company in latter 2018 tells me that they think oil will be higher then and also that sentiment will have improved for the oil market by then as well (causing investors to be even more excited about their IPO). https://www.cnbc.com/2017/10/23/saudi-aramco-public-offering-is-on-track-for-2018-ceo-amin-nasser.html
Trading seems fun, exciting, exhilarating, etc. so it has a lot of draw to it. And many people won't dig deeper than the euphoric emotion that they feel. However, trading is MUCH harder than investing. And much of the industry is bent towards getting you to trade rather than invest.