Exactly absolute best time to invest was yesterday but since we can not go back next best time is right now. There is no use worrying about chances you missed. Your point that investing today is better than waiting is spot on. It is about time in market over timing market. Trying to buy at lowest point and sell at highest with something as unpredictable as Bitcoin is really hard and usually does not work out. It is mostly better to just start investing and hold onto it for long time. Many people like strategy DCA. This helps lower risk from big price swings and lets your money grow steadily over time.