The SEC's highest-ranking official appears to be softening his sentiment toward ICOs.

At a Princeton University event Thursday, SEC chairman Jay Clayton went so far as to reject the idea that all ICOs are fraudulent, answering "absolutely not" to a question centered on whether his agency's actions against the founders of blockchain projects amounts to such an admission.

Clayton's remark came during a talk on "Cryptocurrency and Initial Coin Offerings," one that was notable given his past statements, including his most famous issued in February, in which he said that he believes "every ICO" he's seen qualifies as a security. Indeed, Clayton opened the talk by telling the assembled students he believes that "distributed ledger technology has incredible promise for the financial industry."

The SEC chairman went on to argue that the steps taken by the agency in recent months could actually help the industry mature overall.

He told attendees:

Clayton continued: "I think if we don't stop the fraudsters, there is a serious risk that the regulatory pendulum – the regulatory actions will be so severe that they will restrict the capacity of this new security."

Elsewhere, Clayton discussed the evolving terminology of the industry.

One of the issues with token sales, he remarked, is the attempt to classify them as so-called "utility tokens," which would ostensibly free them from any kind of designation as a security. As such, he reiterated his view that almost all token sales purport to sell such products, despite the fact that they are actually securities.

If a startup is "offering something that depends on the efforts of others, it should be regulated as a security," he told the gathering of students on Thursday.

Clayton used an analogy to describe the difference between a utility token and a security token.

"If I have a laundry token for washing my clothes, that’s not a security. But if I have a set of 10 laundry tokens and the laundromats are to be developed and those are offered to me as something I can use for the future and I’m buying them because I can sell them to next year’s incoming class, that’s a security," he explained.

Still, he suggested that such a definition can evolve over time.

“What we find in the regulatory world [is that] the use of a laundry token evolves over time," he continued. "The use can evolve toward or away from a security."

Further, nations may experiment with sovereign cryptocurrencies, while startups might develop different kinds applications with the underlying technology, he added.

Whether a token qualifies as a security could also change as the industry evolves, he said, adding:

"Just because it’s a security today doesn’t mean it’ll be a security tomorrow, and vice-versa.”

Jay Clayton photo by Mahishan Gnanaseharan for CoinDesk