There are traders and investors who just follow the basic rule that when the price falls, that is the perfect time to buy. Hardly a few traders go to reply and buy crypto after understanding concepts like "Bitcoin Whales". I wish you luck @Wiwo for buying Bitcoin and you will definitely be satisfied with your investment in the coming future.
I think until now, that basic rule is still working. But make sure that you are buying those coins who have high potentials to be more valuable in the future. Otherwise, you'll end up wasting your money because those coins never even recover from price drops.
But for OP, congrats on your newly owned bitcoins. It must have been a huge capital to start with, but it will surely pays off when bitcoin recovers and hits another ATH again. Right now, bitcoin continues to drop its price but i know after this, bitcoin will have a higher target of price for its new ATH since price corrections give strong support for its new ATH to achieve.