[berthe]

> There are people that spend most of their available hours staring at screens of graphs while trading various tokens in order to achieve the highest score... but of course we call them professionals not addicts.

Not really, we call them workaholics (e.g. work-addicts) if they're so compelled to work that they can establish boundaries between it and the rest of their lives.

http://www.dictionary.com/browse/workaholic

[nostrademons]

Do we? In some professions (eg. investment banking, medicine, corporate law, fashion, entertainment) long hours are so ingrained in the culture that the rest of the world doesn't even bother to call them workaholics, because it's exceptionally unlikely that anyone from the rest of the world knows them on a personal level.