they are professional traders i believe, this mean that it's worth for them to trade, and to generate as many P&D as possibile, obviously there many whales, so some of them will end up losing money
the point here is to increase your bitcoin number, holding them can't do that
and they don't dump , but they make you dump, to buy cheap, at least this should be their strategy with all those walls
Do you this they may have gambler's type of of psychology? Some of these recent sharp dumps seem to be more downward than they amount they could have pumped. I get the impression that some are just gambling again and again and losing out.
I do think these dumps are pushing some guys away from btc and thus having a bad affect on the price. The whales would do better to just let things grow. After the recent dumps the growth rate has suffocated.