Too bad the title uses the moniker "Hackers" to describe the two men involved... The article title should read "...Followed Two Psychopaths..."
Fast & Furious comes to mind unbidden- lots of young men love cars, speed, driving. Here's a movie celebrating their earnest passion. Oh, by the way, in case you weren't paying attention the cast is a crime ring and fast cars are how they evade the law.
Same question goes for bitcoin- and lo, it seems these men were involved in that too.
It has changed over the years to a completely different meaning, hacking was never meant to be a direct reference to criminal activity but that seems to be where it has evolved
The hacking culture was more about using technology, systems, or anything really in ways not originally intended by the manufacturer, or administrator of said system, technology or object
That can be either legal or illegal but the act of hacking itself was not legal or illegal it depended on the system or object you where hacking
Today however people almost exclusively use the term hacker to refer to criminal activity