The choice to buy Bitcoin depends on many factors and objectives. I would advise you to keep an eye on the whales, if they are draining bitcoins, then you can’t enter the market...
Those factors shouldn't be any hindrance at this moment, knowing full well that we're approaching an event that will usher in a new ATH. Bitcoin is still below its present ATH, and we know that it had always overtaken its previous ones to create a new one. If you were looking at any factor that could hold anyone back from buying, that should be during the bear season, not now. ATM, the market is excited.
By the way, anyone can buy at any time they want. Actions of whales can't stop anyone from trading or investing.