Don't blindly follow anyone. Rather than thinking whether you should buy or wait, I'd personally suggest you take a calculated risk investment. For example, if you have $1000 that you can afford to lose (remember the first rule of investment), then you should use buy it little by little using that money. Suppose at this moment BTC price or any other coins price was $1, you can spend $100. After that, if it goes lower again, you can spend another $100, and probably you can do this three times. After this, if the price still falls again, you should stop and instead of purchasing crypto you can use that money to buy another financial asset, such as gold or other.