Yup it's possible without doing any further investment itself because it's a Christmas and holiday time normally in every year these months price use to get increase so there are much possibilities to reach 1000 btc for bitcoins.
As what can we see on the happenings with the price of bitcoin it seems that 1,000 bitcoin is not that exaggerated like just those other people are speculating with the price of bitcoin. And I guess if many investments are going to be in the economy such as buying of many alts then this can make the price of bitcoin reach this price that many are speculating, including I.