I would say that the potential is worth it, depending on your current lineup of course. If you can find a guy that you hate starting and you can drop him, great.
Point is, there is POTENTIAL for Bryant, whereas the rest of the NFL has played over half the season and we basically for the most part know how the rest of the season is going to go, barring injuries. Keep in mind his ceiling is limited because he will be lining up behind Michael Thomas, but again. Potential. Drop whoever hasn't given you results.