Some reasons behind bitcoin rising so fast: CBOE announces plans to launch futures and options trading for Bitcoin[0]. Amazon buying cryptocurrency domains[1]. Bitcoin segwit2x hard fork coming[2]. Snowball effect

If you are looking for an investment advice for cryptocurrencies then a Fortune Teller may be your best bet, but please don't invest more than a couple % of your savings.

[0] https://seekingalpha.com/article/4118265-bitcoin-cboe-trade-... , [1] https://www.cnbc.com/2017/11/01/amazon-buys-crypto-domains-b... , [2] https://www.forbes.com/sites/laurashin/2017/10/31/what-will-...