Your first question is the "why cheap price". You know not the only altcoin cheap price but also Bitcoin. Your second question is the "is it time to buy", If you are a new investor then yes or if you are an old investor then you are fine to take the decision. Your third question is the "why cheap price every mid-year", you know the world has rules and it's followed, so if you think like this then you will get your answer nicely.