Ann: FBR Executes Binding US Agreement with CRH Ventures Americas, page-204

Totally agree, when one goes they will all go or at least will all try to go.
As a construction company, you wouldn't want to be trying to compete in a market against a company that has the HX advantage.
When scaled up, to businesses like construction companies which are inherently highly leveraged businesses with low margins, the HX could mean the difference between earning your cost of capital and making a loss.
Don't forget all the other ancillary benefits the HX provides outside of just speed and cost. These benefits will ripple through the industry which is why I say FBR has disruption potential.

FOMO will surely kick in and whether the big boys or brickies like it or not change is coming for them, they can either adapt or wither away into obscurity.

Any ideas if the trading halt will be lifted later today or on Monday?

Not investment advice. My opinions only. Do your own research, etc etc,