My observations so far - the top gigs are the ones who are doing what they are good at. A few examples - https://uk.fiverr.com/ukulelebandito/write-perform-and-recor...

https://uk.fiverr.com/reverbdominatio/professional-voice-for...

I think Fiverr is for someone who can help others with their hobby, but I highly doubt if it can ever be fully grown into a professional freelancer network!?