I don't think anybody knows exactly what's behind the curtain, but many suspect Wall Street price manipulation after introduction of Bitcoin futures markets. Presumably, while they were wrecking the price on exchanges, they were buying on OTC markets.
So As you think, Is their arrival is a must for Bitcoin price goes up again?
Even if not them, others would come. Despite Bitcoin being on the media front and center for quite some time, most people are still not familiar with cryptocurrencies.
Why Wallstreet doing this price manipulation in the cryptomarket as you think? what is their purpose to do so? I have a different idea?