As trading of spot bitcoin funds got off to a first day of action in the U.S., users with brokerage accounts at Vanguard were not able to participate.

When contacted by telephone on Thursday, a day after the Securities and Exchange Commission approved 11 spot funds, a Vanguard customer service representative said bitcoin ETFs were not available on the platform because they were "highly speculative," "unregulated" and didn't fit with the company's long-term investing philosophy. The representative noted that the platform didn't allow other kinds of investments, such as leveraged ETFs.

A company spokesperson confirmed that the spot bitcoin funds were not available on the platform.

"We also have no plans to offer Vanguard Bitcoin BTC -1.28% ETFs or other crypto-related products – our perspective is long-standing that cryptocurrencies' high volatility runs counter to our goal of helping investors generate positive real returns over the long term," the spokesperson said.