A proverb meaning 'a prediction may come true or not' — used to express that fortunes/forecasts are uncertain and ultimately up to fate.
宝くじは当たるも八卦当たらぬも八卦だから、あまり深刻にならないで買ったらいいよ。
Lottery tickets are hit-or-miss, so don't take it too seriously — just buy one (lightheartedly).
占いの結果に一喜一憂するより、当たるも八卦当たらぬも八卦だと思って行動しよう。
Rather than being swayed by horoscopes, think 'it may or may not be right' and act accordingly.