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.
Bitcoin and cryptocurrency and blockchain in general present a once-in-a-lifetime opportunity to experience explosive wealth generation within an asset class that is set to not only disrupt the banking but also the legal sector.
Although investing in established asset classes are safer (e.g. stocks, bonds, and property) safer assets also have less potential for growth. It is unlikely you will make significant money in safe investments. Great wealth made quickly is normally achieved by ramping up risk significantly, e.g. through leverage or by shifting funds into risky areas, e.g. emerging and frontier countries as well as emerging and frontier technologies.
Blockchain is a frontier technology, a nascent market unburdened by excessive regulation or rent-seeking monopolistic entities. It will not be like this forever. We have already seen web, social media, and smartphone technologies becoming dominated by large companies that have laid in place the infrastructure upon which commerce in these areas operate, e.g. Google in web; Facebook in social media; and Google, Samsung, and Apple in smartphones. These three tech sectors of web, social media, and smartphones make up the bulk of the Nasdaq 100, an index that is now quite saturated.