There are plenty of "Ethereum Killers" out there. From Cardano ADA, to Tron, Tezos, EOS, Cosmos and Algorand, many other blockchains are running well and aiming to take a bite out of the blockchain industry for applications like Smart Contracts.
I do strongly believe that there is space in the industry for more than 1 company. Look at smart phones and computers, you have many different companies that make devices. Many businesses that are successful and continue to make a profit.
While Ethereum has been slow to move to Proof of Work (PoW), they will get there. And most likely this year in 2020.
The main reason I feel that Ethereum is here to stay is the amount of companies and organizations that have already spent years implementing solutions on the ETH blockchain.
Santander, a gigantic, international bank, has successfully issued millions in bonds on the public Ethereum blockchain.
Known as one of the "Big Four" accounting firms, Ernst and Young (EY), has dived in deep on using Ethereum to better their business and help their bottom line.
EY has released the source code for "Nightfall" and made it open source. This enables private transactions on the Ethereum blockchain. Having such an enormous company as EY developing solutions using Ethereum says a lot and it means that Ethereum is here to stay.
One of the most exciting use cases for blockchain and cryptocurrency is the tokenization of assets like real estate. Imagine owning a small amount of apartments and condominiums all over the place. Some day you'll be able to do this with blockchain technology.
However, if you want to get started with crowdsourced real estate investing, you don't need to wait until it's blockchain ready, which could still be years. You can start with just a few hundred dollars on Fundrise. Fundrise keeps you up to date on all of your real estate investments. You get a little bit of a lot of properties and wonderful interest rates for your returns. I highly recommend Fundrise.
There are many more applications for blockchain technology like Industrial IoT and sensors monitoring water, flood warning systems, and other environmental sensors.
There will likely be many blockchains that survive in the future. However, it's doubtful that the thousands of cryptocurrency coins available today will continue to be sustainable and profitable enough to survive the coming years.
Out of all of the blockchain ecosystems, you've seen some of the strongest reasons why Ethereum will make the cut to survive in the cryptocurrency industry.
What do you think?