It’s a buzzy, exciting technology, but blockchain is only in the early stages of development. Cryptocurrencies have been making dramatic headlines for their outsized gains and tremendous losses, but more pragmatic blockchain applications have had a much lower profile.

Large, established public companies have dabbled in blockchain businesses while smaller, more focused firms have put blockchain and crypto at the core of their operations. In either case, there has yet to be a killer app that has made the case for blockchain as a core part of the future of business and technology.

This means investing in the stocks of just one or a few blockchain or crypto-focused companies is very risky. That makes choosing a diversified blockchain ETF a less risky way to get exposure to the industry. The blockchain ETFs on our list invest in dozens or even hundreds of stocks, providing plenty of diversification in a single fund.

Given how rapidly the blockchain space is evolving, choosing a blockchain ETF for your portfolio could be the best possible choice for investing in the industry.

Michael Adams held a position in NVIDIA Corp at the time of this publication.