I've done research papers on energy drinks/caffeine and they only cause strokes if you consume a shit load of it which causes your blood pressure to rise which causes strokes, but the high blood pressure is very temporary. We form a tolerance to it the more we drink it too haha.
Generally, sports players are addicted to drink energy drinks during them match. In mean time they just drinking this energy drinks and getting boost of energy. Even, I had also started to drink this kind of cool energy drinks and I used to drink Red bull frequently.