If there’s one constant in crypto, it’s volatility. Since Bitcoin first emerged in 2009, there have been euphoric upswings and catastrophic declines. Crypto bubbles lead to crypto collapses.Arjun Sethi, the co-CEO of Kraken, one of the world’s largest crypto exchanges last reportedly valued at $15 billion, believes we’re now in the midst of a bubble. When Fortune’s Jeff John Roberts asked the crypto executive whether that was the case during a panel at the Fortune Brainstorm Tech conference in Park City, Utah, Sethi responded yes—with some nuance.“Are we in a bubble or not? If I look at the overall slope over 15 years, I would say no,” said the Kraken executive. “If you look at it quarter by quarter, the answer is yes, we get into those bubbles all the time.”That even a crypto CEO would say that his industry is headed for a potential crash speaks to the frothiness in the crypto markets over the past year. Since January, Bitcoin has repeatedly notched all-time highs and the total market capitalization of all cryptocurrencies has crossed the $4 trillion for the first time. That’s not to mention blockbuster IPOs from the stablecoin issuer Circle and the crypto exchange Bullish.While some of that enthusiasm stems from Bitcoin’s correlation with the stock market—the S&P 500 has also set new records since President Donald Trump’s inauguration in January—pro-crypto regulatory changes in the U.S. are also a likely factor for crypto’s recent surge.But all bubbles eventually pop, and there are already signs of a potential burst, including declining enthusiasm in crypto’s newest trend: digital asset treasuries, or public companies that amass crypto on their balance sheets to boost their share prices.Proponents say these companies let investors gain exposure to cryptocurrencies not readily accessible within their brokerage accounts, but detractors say these firms are a quick cash grab and will eventually collapse. There may already be signs of that collapse. Last week, the average drop in stock price of 15 digital asset treasuries tracked by Architect Partners, a crypto M&A advisory and financing firm, was 15%.Still, on the same panel with Kraken co-CEO Sethi, billionaire Barry Silbert, founder of the crypto company Digital Currency Group, was optimistic. “There’s a whole lot of crap in crypto right now, which is overvalued. I think 99% of crypto is absolutely going to zero,” he said. “But that asset class, the crypto asset class, is absolutely not in a bubble right now.”And if Bitcoin’s history of big drops and even bigger rebounds is any indication, Silbert may be right.Klarna… Yesterday, Klarna went public in a long-awaited IPO, where the stock popped as much as 25%. In the lead-up to listing day, Klarna CEO Sebastian Siemiatkowski sat down with the Term Sheet Podcast to talk about preparing to go public, why he loves Walmart, and the future of financial services. Catch the whole episode here.Ben WeissX: @bdanweissEmail: benjamin.weiss@fortune.comSubmit a deal for the Term Sheet newsletter here.Joey Abrams curated the deals section of today’s newsletter. Subscribe here.This story was originally featured on Fortune.com