What's likely to happen afterwards will be month after month of nothingness. Most people will be gone. Price will have a barely detectable pulse. Many fewer will want to spend or trade. Anybody whose income comes from fees will find they ain't getting any.
Which services do you think will weather this and which will croak?
there's been a plethora of small, new exchanges launched over the past year---both centralized and hybrid decentralized. i imagine a long term low volume lull will shake a lot of them out of the market. some will be tempted to exit scam, no doubt.
i think we've already seen the bulk of these campaigns (at least the BTC-paid ones) fade away, so i don't expect much to change from here on out. i'm sure when a bull market eventually emerges, they'll ramp back up again.