This is the stupidest thread I read all day. Congrats.
How many coins are being mined every day is totally irrelevant, it's about how many are being bought and sold on the exchanges.
You're wrong.
Miners behavior make them to sell mined Bitcoins. It's not 100% of miners but significant part of them. The only way to prevent exchange rate from falling down in this conditions is constantly rising of Bitcoin demand in the market.