Long, cold winters and short, bright, explosive summers are the natural seasons of this planet.
Winters do not apply in all regions of this planet, especially those countries that lie within the tropical region. I agree that these seasons are naturally-occurring to our planet, but it is wrong to compare it with what happened to the ATH way back 2013. You know Willy was involved in that rise, more people helped him to finish the job because of the hype.
I refer not to Earth, but a different planet that twinkles like bright metal on a sullen ground.
Anyway, if Willy's trades had this effect on price, with what appears to have been an averaged purchase of ~$300/BTC, then such buying would have occurred naturally with actual fiat simply out of a motivation for profit, as with "Momentum Ignition" in stocks.
Well I hope that this planet is not very far from here because things will change drastically.
As for the Willy trades, almost everything is manipulated by the bot itself, the market followed suite when they notice that things are going to get crazy so they joined in. And that itself isn't a natural occurrence, because they figured out something is happening that's why they also bought and joined the party.