How is this "risky"?
The market has been demonstrated: there are buyers for this offering.
Execution is the name of the game, and it sounds like while your competitor has been executing, you've been waiting and seeing.
The fact that people are buying whatever this is should be impelling you onward! Yes, people are trading money for it! No need to prove the concept--just get in there and execute!

Figure out your competitive advantage. Maybe it's in the branding. Try to stay away from using price (live by price, die by price). Maybe it's in a better avatar.

You don't need 6000 clients to be successful. Figure out what you do need, and stop comparing yourself to others. You have a goldmine here: someone else has already done the heavy lifting of proving the concept, developing marketing you could copy, and figuring out what people will pay for the thing. Get moving.