fact is, bika is a serious threat to anyone in his division, only if they take him lightly. because they all have the marketing edge over bika, all they would need to do is win a few rounds and not get knocked out, the scorecards would favor them. therefore, he resides in the top 30, but not top 10 and it would be a stretch for him to make the top 20 without more activity and a few more nice knockouts.
Bika grinds out fights. So he is capable of fighting much better fighters and making it a competitive fight. However, though he is capable of frustrating them, he is not good enough to beat them. He is a great gatekeeper. If you can beat him then you prove yourself to be a very good fighter. He would probably be in the top 100, but not above the 60th spot.