There is far more to this than simply possessing the code. Nu’s first-mover advantage is important, but in my opinion the quality of execution and public profile trumps everything.
As several on this forum have noted, Bitshares is doing their project a disservice with the unprofessional and sometimes childish manner in which they have misrepresented and attacked Nu and its developers. This is entirely consistent with their past actions and I would not expect this behavior to change anytime soon. I feel confident that serious investors have taken notice of this, as reflected in the current trading activity of both tokens. Some in the Bitshares community insist the Nubits volume is being faked, yet they are contemplating plans to do just that:
If the Nu code goes open source, there might be a danger of its adoption and implementation by a high-profile, well established company like Apple or Google. I doubt, however, that a public company would want to be linked with an alternate currency pegged to the USD.
It would be difficult for a crypto startup to execute an outright copycat strategy because of Nu’s significant head start. Bitshares won’t copy the code simply as a matter of principle. They disdain Nu.
For these reasons, I favor making the code open-source.