I have been Working on fiverr for 2 years now! and I really feel blessed and lucky that i found out this site! and I believe withing next 2 months I am going to hit my $50,000 Target!
As a freelancer you need to understand, there is always up down, some months you get more work, next month could be less! And as a Human being , I got scared too sometimes when i see the graph going down! but again it boost up! But for last 2 years I never stop experimenting with my gigs! like an example. I have 20 gigs active on my account, I normally do logo design. and I always try to keep all my gigs running! there was a gig for Professional logo design, that I made got 20-25 order in 1st 2 months after i created , then suddenly stop getting order (Some others gig was still working good). as i mentioned I always wanted to see my all gigs running and getting some orders! then I have changed the tags and description to make it better, but still did not work! 3/4 months no orders on that gig! then I decided to target only specific niche for this gig, and changed title , description and tags , and make it Food/drink/restaurent logo design! and from next day, i got 3 new orders! and now its one of the best selling gig this month!
its just an example! there is lots of scope for experimenting you gig! I saw lots of new seller complaining not getting orders. and i understand its always hard in first few months! do research , trust me there is always a way then you can make it works!
last night, I was exploring some other gigs and i saw, there is a new seller , not even level one yet, have complete 130+ order (reviews) and 16 more work on the queue! there is other one , who joined fiverr in same time like me, but has more then 16000+ reviews thn mine! both have same similarity on their gig - delivering the design within 2/3 hours and unlimited revision! so it might something you may try if you are new, but you need to understand, i think they have a group of designers. that can handle all those work in time (they have lots of neg review as well)! and when you play the trump card of reducing the time to 2/3 hours for delivery, your customer support should be extremely well! and you can not compromise the quality of work saying its short time!
as it has lots of chance of getting new work, and there is a big chance of getting bad reviews as well. if you could not manage the time!
Just a personal opinion!
have a great day 
I have been working on fiver last 3 months. Got an order and good review. But after that not getting another. it’s made me bit a disappoint, but I don’t stop researching. As a result, I am updating my gig. After editing one of my gigs didn’t found in the search result. Not with my other gig. I have to edit another 4 gig, but I’m afraid. I have contact with CS, they took time to fix it. Just waiting.