Game of thrones is one of the most popular TV shows of the last few tears. Everyone is going nuts about anything GOT related.
This is why I think Game of Thrones inspired jewelry can turn a huge profit for people skilled in arts & crafts, especially jewelry.
All you have to do is watch the show and look closely at the type of jewelry those characters are wearing, chances are a lot of people are looking at the show and may be interested in purchasing similar stuff.
For example, Lannister is one of the biggest Houses of the Game of Thrones universe, a lot of people are searching for particular jewelry that Cersei Lannister in wearing, especially the Lion neckless.
Here is the Google trends chart for the last 5 years on game of thrones jewelry:
Notice it spikes every year when a brand new season starts as well as right after the season is finished, that's when you want to publish your Game of Thrones inspired jewelry!