In theory, Yes.
Too few good exchanges. There is almost no competition.
But practically - no.
Too much guano, and so. Hell will break.
We all know that the main problem freelance exchanges in inadequate customer and Amateurs performers.
It's human nature. You realize that going against the basic principle - "we would help"?
We will not go into implementation details, but do you think that will be a success if the platform on which customers would be 90% sure that you will not get an unreliable performer, and the performers will also be sure that the exchange mainly conscious customers?
You have discovered the philosopher's stone?
If Yes, then you'll be Golden.