The advice you'll always receive is buy low and sell high, I could be wrong but I feel bitcoin is close to the top with regards to its current price, I expect a fall of some extent in the coming weeks, however it is impossible to predict with anything even close to certainty.
Written like this, it looks very simple: buy low and sell high. But when is it low and when is it high? Answering these questions can make a huge difference between poorness and wealth, between losing money and earning money. Any market is difficult to predict, but this new crypto-market is absolutely crazy! I think it can be considered a sort of gambling in some ways...but in the long term I'm pretty confident Bitcoin (and altcoins too) price will rise and it can reach very high peaks, so my best suggestion is to hodl. But in the short term, it's nearly impossible to predict what will happen...