Yesterday, ethereum celebrated its fourth birthday.

Four years ago, on July 30, 2015, the world’s first general-purpose blockchain platform went live. Called ethereum, the platform was the first of its kind to feature a Turing-complete virtual machine and native programming language able to deploy code of any algorithmic complexity.

“Before ethereum, developers had to design and write extremely complex software,” blockchain researcher Mihailo Bjelic told CoinDesk. “Ethereum introduced a generic programmable layer which abstracted this whole process and enabled developers to build decentralized applications by only writing their applications' core logic.”

There are roughly 800 monthly active developers building on the ethereum blockchain, according to new data from investment firm Electric Capital.

“This means that the ethereum ecosystem is experimenting an order of magnitude more than almost every other ecosystem,” said Electric Capital founder Avichal Garg.

That said, ethereum is no longer the only general-purpose blockchain in the world, nor even the most active by some metrics. The most recent quarterly report from Dapp.com shows that while ethereum is still the first choice for developers, other decentralized application (dapp) platforms such as Tron and EOS surpass ethereum in the number of active dapp users.

That leaves many industry observers wondering where ethereum will be in another four years. Will it retain its lead as a general-purpose blockchain platform in the face of a fast-rising competition?

Eric Conner, founder of information site ETHHub and product researcher at blockchain startup Gnosis, said:

Both proof-of-stake (a comparatively more eco-friendly version of the current consensus algorithm on ethereum) and scaling are bundled into an ambitious upgrade called ethereum 2.0 that many, not just Conner, envision to be completed in the next four years of ethereum’s existence.

Said Anthony Sassano, marketing and growth lead at ethereum-based startup Set Protocol:

At the same time, it’s not just core bottlenecks in the technology limiting transaction throughput and efficiency that experts say will need to be resolved about ethereum in coming years. Others both within and outside of the ethereum community say in the next four years, ethereum will also have to overcome challenges associated with its monetary identity.

Yaz Khoury, director of developer relations for the Ethereum Classic Cooperative (which helps build the protocol for ethereum’s sister chain, ETC), said:

To this, Ryan Sean Adams, founder of another crypto investment firm called Mythos Capital, sees ethereum establishing itself as a digital currency in four years time.

“Four years from now, it’ll be obvious that ETH isn’t a utility coin, it's money. A programmable store-of-value money,” he said. “Lending, borrowing, trading, saving. Each of these will be public protocols in the ethereum economy.”

As such, MakerDAO’s Conti thinks ethereum 2.0 and scalability challenges aren’t all that important to the immediate future of the protocol.

The continued growth of decentralized finance applications, on the other hand, is.

Mariano Conti, the MakerDAO Foundation’s head of smart contracts, said via email:

On the flip side, major investors in ethereum say they aren’t worried about how the platform will transform in the next few years. On the contrary, progress in the last four years of ethereum’s existence has only proven to cement the technology’s lead.

“Ethereum has progressed significantly in making it easier for developers to build,” said Scalar Capital founder Linda Xie. “There's improved language, tooling and infrastructure. It's still a work in progress but it's much easier to build an application now than in the early days.”

Mythos Capital’s Adams estimates that close to $15 billion worth of tokenized assets have been generated on ethereum thus far. These assets will continue to snowball in popularity and generate even greater value for the ethereum platform in future years, says Adams.

“We’re also seeing a first generation of [decentralized finance] protocols [on ethereum], with $500 million locked in lending and exchange protocols over the last 18 months," Adamas said via email. "These protocols will form the banking layer of this new open finance system.”

2019 alone has been and will continue to be an inspiring year for ethereum, said Paul Veradittakit, a partner at Pantera Capital, the oldest U.S. bitcoin investment firm which has invested in over 20 different ethereum-based startups to date.

“The Ethereum community has stayed focused during bull runs and kept faith during the crypto winter,” Veradittakit said, adding:

Vitalik Buterin image via CoinDesk archives