If you want my advice buy NOW. market should return the end of Feb...done the same thing every year for the past 4 years. However in the long term - I believe this is the final year for king BTC. It will be dethroned by newer, faster, and more private blockchains. BTC is old and slow tech, something that just cannot compete with the new blood. It will always be the genesis but like diners club, will fade into memory and only be accepted a a few high end places in the end.