You should invest now atleast 50% on alts and 50% on bitcoin. Find those coins right now that is under valued and those coins with a huge upcoming news. That will give you an easy profit.
So if you know price of bitcoin will increase again then why they are confused about bitcoin. You know bitcoin use to increase and decrease because of us, if we will show interest for bitcoin and will take mature decision bitcoin will keep increasing. It is good to invest because price of bitcoin is increasing maybe more waiting will give you lose so buy today and hold for long time so you will have profit.