Why not? Porn drove much of the storage technology and video codec technology forward we use today. Electronic trading drives much of the networking technology the world runs on today. As much as it is mostly scamming and haxx, there is some genuinely interesting computer science research happening around Byzantine fault tolerance and distributed systems in the blockchain space. Just because you don’t like it doesn’t mean it isn’t legitimately moving the needle forward in tech we will all use eventually.
Because, as always, if you were competent, you would not be working on cryptocurrencies.