Ether has grown 40 times in two years. You can create full blockchain applications without intermediaries. From what can be filed: mathematically fair casinos and bookmakers, currency exchange, crowdfunding, simple notarization, issue and custody of shares on the company. Projects work without the mediation of people, which takes away from the owners the opportunity to take the whole jackpot from the project and dump it.
A very promising project, a productive team (see what Vitalik Buterin is doing now). Ether is the second largest market capitalization after Bitcoin, while it is still 10 times less - that is, even with a conservative forecast that no currency will become more bitcoin, it can grow 10 times.