1. If the reason is “cartel-like” ecosystem then maybe a kind of regulation has to be adopted to make sure there is no such potential. The possibility of monopoly is real since Libra is gathering together some of the richest companies in the world. It could affect free market and healthy competition. But there is no need to halt the project.
2. If the reason for halting is that the project is “based on relatively new and unproven technology,” and that cryptocurrencies are “uncertain and evolving”, this is not enough. It has already been demonstrated that cryptocurrencies and the technology that they represent are very viable in our modern world.
I cannot see a very valid reason why Libra project should be halted. The way I see it, this is their real reason:
Central banks, government ministers and watchdog chiefs have been lining up to demand more information on the project over fears it could pose a threat to central bank money and financial stability,
This is just an excuse of the fearful chiefs:
and provide a global avenue for money laundering and fraud.