99.9% of the time, paying with bitcoin goes through a payment processor such as bitpay, bitpay instantly sells your bitcoins for FIAT hence putting sell pressure on the market. So basically if people take your advice right now and start buying products with bitcoins, the price will fall.
No that is a myth.
The reason the BTC price is falling is that miners are selling immediately, and not hoarding.
thats a myth too.. miners are not selling out instantly. most of the exchange markets are not doin much FIAT bank transfers in comparison to daily trade volume..
well over 90% of price movements is done by bots/daytraders who play with the prices, without withdrawing/depositing