Apple co-founder Steve Wozniak said that “only Bitcoin is pure digital gold” in an interview June 4, reaffirming his belief in the cryptocurrency despite having sold most of his holdings.

Speaking to CNBC at the ongoing Money20/20 conference in Amsterdam, the veteran developer said he “bought into” comments from Twitter CEO Jack Dorsey about Bitcoin becoming the “single currency” of both the internet and the world. Dorsey spoke at two events in March and May, where he predicted that Bitcoin would become the international currency of choice by 2028.

“I buy into what Jack Dorsey says, not that I necessarily believe it's going to happen, but because I want it to be that way, that is so pure thinking,” Wozniak explained.

Wozniak reiterated that he is “not an investor,” having originally purchased Bitcoin at $700 to experiment with its use as a means of payment. “I have one Bitcoin and two ether,” he told CNBC. Nonetheless, for Wozniak, Bitcoin represents a separate class of crypto asset to all others:

“Only Bitcoin is pure digital gold… and I totally buy into that. All the others tend to give up some of the aspects of Bitcoin. For example, being totally decentralized and having no central control. That's the first one they have to give up to try to have a business model.”

As prices of both Bitcoin and major altcoins remain suppressed in June, Bitcoin having lost around 20% last month, some sources claim that current conditions present a good opportunity for buyers.