Mostly will say that your opinion is wrong. As the market fluctuates, you should invest and that's the perfect timing to buy bitcoin. Have you heard someone told you that you should invest only when the market goes up? I guess there's none.
Don't make the strategy more complicated than you are ever thinking. Use the best strategy of all and that is through.
Follow the simplest strategy, buy low and sell high, and that`s a clean profit for you in your pocket!
When you ever got the right entry, you'll be thankful that you ever entered the market during that time when the market's down.