> Just give us a date/year/etc in which you think the value of bitcoin will go to zero

So you can take advantage of the market? No way, only insiders are allowed to do that.

I could change your question: Do you think possible that the value of bitcoin will go to zero?

If yes, you implicitly agree that it's fueled by speculation and a Ponzi scheme that needs a constant influx of fresh, if boring, fiat currency.