If the crowds all give up on mine bitcoin for the cost then whales will do it for them. When the difficulty decreases, the whale excavator will produce more bitcoins and then they can manipulate more easily in the future.
i think you are confusing a "whale" with "superman"!
the fact is that most whales don't even understand bitcoin. they think bitcoin is some numbers on some website (aka the exchange) that they can buy/sell to make money. if you tell them about mining they wouldn't know what you are even talking about.
not to mention that to mine bitcoin one has to have ASICs. your comments suggest any whale is holding some ASICs under their bed to pull out any time they want and mine bitcoin with it.