There is no one who can tell you when next correction will be or if the market will go up or down at a certain time. Just invest smart and hope for a great 2018.
Always in each year is a correction in cryptocurrenices . You will never escape by this correction . Next correction will be again this year , in one year is probably for 2-3 corrections . But do not worry we will see btc to 100k in near future
Happy hodling