No Bitcoin was the first and almost the other coins can just be traded by BTC so the demand of BTC will always be higher then an altcoin.
you wish
It depends on wich coin is held by people. If people don't hold bitcoin and just use it as a gateway to alts (which they hold) there doesn't need to be increase in btc price at all.
I hold alts and fiat. I do only hold btc for very short time to move between exchanges as i lost hope and trust in it. Practically speaking: i trade alts directly for fiat. Btc is just in the way.