Bitcoin is very volatile; you can buy Bitcoin today, and the price can drop in the next few minutes. This doesn't mean you have lost the value of your Bitcoin or that the price will continue to fall and won't rise again. You have to understand volatility before investing in Bitcoin. If you don't understand it, you will always have problems with when to buy Bitcoin and when to sell. There is no perfect time to buy Bitcoin; you can always buy Bitcoin at any time, and if you do, you need to hold it for the long term. If you have made a good profit while holding, it is up to you to decide when to sell.
Your comment is very misleading. An investor never needs to understand the volatility of Bitcoin to invest. Only if a person has basic knowledge about Bitcoin and a source of discretionary income can that person invest. If a person waits to understand the volatility of Bitcoin to invest, it will never be right. It is never possible for anyone to understand the volatility of Bitcoin. No one can ever say when and why the price of Bitcoin will rise and fall.
An investor will never wait for the price of Bitcoin to fall. An investor will prefer to continue buying continuously with his source of discretionary income. A trader is worried about the price of Bitcoin to fluctuate. Investing is a long-term investment, such as a period of 5 to 10 years. If a person waits for the price of Bitcoin to fall, he may fall far short of his portfolio goals. Many buying opportunities may be missed. Therefore, it is never a good idea to wait for the price to drop. An investor should always continue to buy consistently, adopting the DCA method.