As Bitcoin (BTC) marks a new all-time high of over $ 67,000, PayPal co-founder and billionaire venture capitalist Peter Thiel says he should have bought more Bitcoin.

Thiel spoke about cryptocurrencies, central banks and artificial intelligence (AI) in an interview hosted by Lincoln Network in Miami, Bloomberg reported on October 20.

“You should just buy Bitcoin,” said Thiel and added: “I have the feeling that I haven’t invested in it.”

The tech investor found that his only interest in buying Bitcoin is a “secretly known” investment. “I think the answer is still long. Maybe it’s still secret enough, ”he added.

According to Thiel, Bitcoin’s recent rally is certainly a big problem for global central banks. The rise of the cryptocurrency to its new all-time high “certainly shows us that we are at the point of total bankruptcy for the central banks,” said Thiel.

During the interview, Thiel also criticized AI as a rival to the decentralized power of cryptocurrencies. “AI, especially the low-tech surveillance type, is fundamentally communist,” he said, adding that AI is a technology that “will destroy the world.”

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Thiel is one of the biggest proponents of Bitcoin and claims that Bitcoin was successful as a currency in 2014. The venture capitalist is also known to refer to Bitcoin as a “hedge against both the world is falling apart”. Earlier this year, venture capitalists warned that the Chinese central government could endorse bitcoin as a means of undermining U.S. foreign and monetary policies.

PayPal, co-founded by Thiel in 1998, made its way into the crypto sector last year. The company officially announced its plans last October to introduce the ability to buy and sell cryptocurrencies like Bitcoin. PayPal has since rolled out crypto services in the US and UK.