Well, that has nothing to do with h the platform or Cryptocurrencies. It's upto people what sorta of jobs they post there and what sorta of jobs people seek. It's obvious that a Crypto platform will have more jobs about Cryptocurrencies than any other category.
For example, the posts that tend to do good on steemit are usually crypto related. Why? Because everyone here is somewhat involved in crypto.
Another example could be the #tags that we use, a contest tag includes posts about contest and similarly a #story tage related to stories. So, its understandable that a crypto platform will have more jobs about Crypto.
But once we go a little mainstream and the general public tends to start using, things will change. Hope it helps. Thanks