I dont think that  it could not happen that we could not reach to the bottom that the value of bitcoin going back to zero,because,as i see now in the market blockfolio  the value of bitcoin and some other altcoin turns back to positive,maybe this is the indication now that the price value of bitcoin going rise again and i hope so,in order that those there saying that the price of bitcoin will goes down into $4000 in 1btc this coming next month will not been happen,instead its going back  to rise up again.