bitcoin is getting popularity and huge buyer and people buy bitcoin for long term hold.
thats why price going up.
yes these are really the facts which are the factors for the price of bitcoin to increase much faster day by day. This factor will remain for life time and the price of bitcoin will continuously increase with each passing day. There is also a sub factor for increasing the demand and in return the price and that is the adoption of this coin by the businessmen for their businesses as this thing make bitcoin a more trusted currency.
So happened since the beginning of BTC,the BTC value has been periodically increased from time to time but not necessarily from day by day because sometimes suffered very hard falls but in the long run its value has recovered and increased considerably.