This infographic sums up my thoughts on this.

See that tiny dot above the words: "bitcoin $19 billion"?
That's bitcoin's market cap in comparison to the global economy which is pictured to the right of that.

market cap is bullcrap bubble number.
i can make an altcoin with 5 trillion coins.
put just 1 coin onto an exchange sell it to myself for $1..
thus my coins are now valued at $1 a coin.
making the market cam $5 trillion.
Be honest.
If it were that easy, everyone would do it.
Which means, its not that simple.
He can't do that because other people will dump before him.

He wants to buy at 1 usd? He should eat the sell walls first, maybe cost billions usd.
Nope, his idea is that he has created all the coins themselves, and only put one on an exchange: offer: 1 coin. And he buys it with $1.-. As such, the official price of that coin is $1.-, its market cap is as he announced, and the volume is $1.-.
Hell, he can even sell it again, and buy it again, many times a day. One single coin in circulation. Next, he buys it at $2.-, and hey ! 100% price rise, and a volume of X coins a day (X is the number of times sold to himself).
Only caveat: he needs to pay a fee each time to the exchange owner.