I foresee a collapse of BTC value when the first large financial institutions release cryptocurrencies of their own, which are actually backed by tangible assets like gold or by fiat currencies.
That is the single point which @CryptoPhilanthropist has not catched - there is no intrinsic value. And the senseless try to back a currency by gold or anything else is just a naive imagination of gold having an intrinsic value which is even not true - it is the coherent believe of the owners into yellow metal. As we see in Bitcoin no bounding to gold is needed to create a coherent believe in the value of Bitcoin. The creation of BTC is genius in an emergent way which is without precedence but comparable to gold, internet, email etc
The speculation that some bank will create its own cryptocurrency may become true but will not affect Bitcoin. That will just be another altcoin like all the other 60 or so ones. If the bank keeps the control over this currency it will be no more than any other fiat just as electronic currency.