But does anyone control it?
Depends what do you mean by control it, there are instances and it could happen again, where a whale has so much BTC that they could just instantly dump it all and prices would drop slightly.
How are Bitcoins created?
Via people mining blocks. A limited supply of 21 million, so it can't be controlled there.
Who is incentivised to create Bitcoin?
Satoshi wanted to break away from the finance industry, just a great man's creation.