A lot of money being released in the wild right now, from people selling old assets, riding profits down the ground on dumb forex investments, grabbing money from savings accounts to invest in housing. Folks just wanna spend some money now. Damn it!
Bitcoin has been around for more than 6 years and still, orderbooks and combined network buying capacity is so fucking thin. One billion invested could lift the prices by $1k. Its unimaginable what happens when all that crisp money gets into bitcoin.
A billion dollars would take the price much higher than 1k if they bought through an exchange