The part you mentioned an investor should wait for the dump which is referred as price decline is actually not right from my understanding, what’s the point waiting when anyone can start their investment using the right strategy and still acquire bitcoin knowledge at the same time. The only point about the dip it allows an investor to accumulate more but, waiting is not advisable mostly for newly investors. Right market sometimes doesn’t matter cause you might be missing out just by waiting for a right market.
It's true that if you wait for the market to go down, you may miss out on investing. Don't wait for the market to drop, it's best to buy Bitcoin with the DCA method. Before investing in Bitcoin you need to decide if you can hold Bitcoin for the long term. If you buy Bitcoin at any price and hold it for the long term, you will definitely profit. If you can't hold Bitcoin for long term then you won't be able to make much profit, you can face loss. Therefore, the most effective way to invest in Bitcoin is to buy Bitcoin using the DCA method. If you can continue to invest in the DCA method for the long term, you will be able to buy bitcoins at average prices.