I'm not a trader, but i've been around a lot of them. I write software. This is my uninformed opinion:
Those personas like "al" are a dime a dozen. They are everywhere, and all over themselves with joy thinking this is the next big thing they're going to manipulate. They're never that smart, they tend to have 1 or 2 plays, and rinse and repeat based on the complete anarchy in the markets. They're cocky and tend to burn out badly, 'hyper-lame-and-sad-to-watch-your-jokes-are-tired-and-boring-nobody-cares' kind of thing.
It's likely right now (for the next few years) they'll be able to manipulate the BTC market fairly easily (or at least their bosses will)
But.. If this becomes a useful currency that people trade for goods and services, IMHO none of that will matter. The value will stabilise through billions of people's livelihoods and businesses.
The ONLY reason they had so much leverage in the past (till now) is because of the fiat and fractional reserve system, corrupt politics, and a broken economy allowing them to leverage themselves to the hilt.
They can try to 'fake' that, but it will never be the same for them if we drop the existing 'framework' and go back to a form of 'gold standard': 'crypto standard'