There are many uses for ethereum smart contracts as it provides services that the traditional banking sector does not provide. The banking sector can adapt to create their own smart contract service, but this does not necessarily mean that crypto networks like ethereum or cardano will be affected.
With the rapid rise in value of the crypto market to more US$500 billion as of December 2017, many are calling cryptocurrencies a bubble simply by looking at the chart that shows prices rising substantially. However, it is important to understand that a bubble cannot be determined with reference to a steep rise in price. Rather, there is a bubble if the price is greater than the intrinsic value of the asset, and cryptos, I will argue, do have very high potential intrinsic value.