It bounced off that low, just FYI.  Bitcoin is back above $6100 currently.

I loved Navigator!  Fond memories of that one.  As to whether bitcoin is going to be replaced by something better--it very well might.  But a decline in price doesn't mean it's dying, and frankly I don't see anything that's even remotely a contender for bitcoin's crypto-crown. 

As to the rest of your confusing thesis, as long as these shitty ICOs keep getting sphinctered out by the hundreds, and as long as they use bitcointalk as an idiot pool for advertising, the forum isn't going to die.  Right now it seems to be as popular as ever.  I think you're just depressed about bitcoin's precipitous plummet, and you might need some professional counseling. 

Bitcoin is going to recover, though.  Maybe you'll start getting that rosy feeling again once we break $10,000.  Hang in there; it's going to happen.