Bitcoin is really unpredictable, but I could say that it will not crash instantly. Bitcoin is ever growing, it will sometimes drop but it really goes up. Volatility is a normal feature of bitcoin, but this doesn't mean that bitcoin is a bubble. The growth is legit because the demand has really increased while supply is decreasing. Way back it has shown sudden increase, they told that bitcoin is bubble, but it just actually having good growth and no suddeb dumping will happen.