We use mass psychology to predict BITCOIN, The only Fundamental aspect of BTC is to render a complete data of entire financial market, and if we correlate SPX and GOLD we can see a clear approach where SPX is extremely Overbought Market is floating upon leveraged Debt and the only question is weather SPX will give a dramatic fall or a slow meltdown.
By keeping an eye on Index's volatility we can forecast the price of BITCOIN which is very unpredictable at the moment,