I have seen the price of bitcoin is very high and has exceeded 15000 $ for one bitcoin, and now the price of bitcoin is under 10,000 $ and maybe this is my chance to buy bitcoin as much money as I have and hope to get enough profit for my economy in the future.
am I wrong with this step?
I don't think that anything will happen without your part in doing things. It is destructive option to rely on somebody else in the questions about your own economy. You need to battle for it yourself.