Pegged crypto currency usually indicates a coin or asset issued on a blockchain that is linked to a specific value of a bank based currency. In usual cases, these coins are pegged to the US Dollar, as it is the one currency that has the most control over the financial sector. Tether is an example of this as their USDT is pegged at 1$ at all times. In regards to BTC having something like this remains to be seen as nothing can be said for sure that something like this can be considered or not. Maybe if more people want something like this the idea might come to reality but for now it is unsure.