the reason that btc skyrocketed is because, many countries and companies and organizations slowly recognizes bitcoins and many transactions are made using bitcoins, specially because December is a Christmas season. So yeah, and I hope btc prices will grow bigger.
Due to the media started covering widely in news channel and daily in newspaper in our country we could read more about btc and the phenomenal gains it has given in the recent years made people more anxious about it. thus many people to get such gains started investing in it and thus demand went up suddenly worldwide in anticipation to keep btc with them and in future it will rise more.