My 200k USD investment in bitcoin now only has worth 50k USD

Guys i am confuse because i invested 200k usd way back in January and now my whole money is worth approx 50k. should i still wait or buck up?

I am not in so old in crypto industry and i don't know whether will it again reach its ATH or not but i am so afraid now a day.

Please help me with your best answer so that i can take my decision accordingly.