[Bit Coin Price History]

Newbie here - I was recently exposed to cryptocurrency and have been studying it. Unfortunately, it was after the bit coin boom of 2017.

I knew that the bit coin had a good bull run in 2017. I just looked at the stats today and I am simply astonished 

Bit Coin Price History
Dec 2013 - $600
Jan 2017 - $800
Apr 2017 - $1,200
June 2017 - $3,200
Sep 2017 - $5,000
Nov 2017 - $7,300
Dec 2017 - $13,800 (at one point it reached $17,900)

So, what were the reasons for the bit coin's gigantic bull run in 2017?

I will also track the reasons you mention and add them below.

When we move bit coins from one address to another address, there is a transaction fee. Few days back, I saw that it was 100 bits (1 Bit Coin = 1,000,000 bits). Now, it seems to be at 500 bits.

How/When does the bit coin transaction fee change?