Do you think these coins will bounceback? Will new ones emerge? Or do you think most people betting with crypto will stick with Bitcoin?
I believe almost all the "real" coins will bounce back 
.When the entire crypto space is into negative trends, we cannot expect gambling based coin/tokens alone performing better. Even these gambling assets are having real time applications, due to market pressure they are currently trading undervalued. In recent days, I did see edgeless gaining more 10% growth in less than 24 hrs in bittrex, just for example I am mentioning this.
Moreover, this topic is sounding like a trading or altcoin related discussion and (I am sorry to mention) not sounding like a gambling discussion.