i think best time to invest.... NOW. because tomorrow price will increase. this motto is able for all days. TTM.
It's just a prediction and also bitcoin will not always increase sometime bitcoin will fall so we have to choose the right time but to invest bitcoin is very not recommended for now because the current price is very high
i am talking from previous few weeks when the price of bitcoin was trading below 1270 USD that in recent time the price of bitcoin is expected to increase more and more and very soon the price of bitcoin will start increasing and now we can see that the price of bitcoin is trading above 1300 USD level that is really a very heavy price.
Its not really surprising anymore since bitcoin price do really always amaze us when it hit a new ATH and yes last few weeks its just in ranging mode and now it already climbs it price again but i do really expect another dumping of price when someone decide to sell off their bitcoin to those who holds a lot but still it wont matter as long people do adopt it prices will still skyrocket in longer years to come.This is the best time to invest when the price of bitcoin is still affordable.