One challenge is the currency's volatility, Baird said.
During a 24-hour period ending Aug. 2, Bitcoin, for example, fluctuated between a low of $39,090.73 and a high of $41,507.63. That range was well below its value in March, when it topped $63,000, but still way above the $11,000 territory of August 2020.
Carriage's Basha said his group immediately converts cryptocurrencies into U.S. dollars using Coinbase, so it mostly steers clear of meaningful changes in value.
At one point, Carriage leaders discussed holding some cryptocurrency as a long-term investment but so far have decided against it.
"As a smaller, family-owned dealership group, it's a little bit harder to accept that risk for our employees," Basha said.
HGreg Group announced in March that its 32 used-only and franchised dealerships in the U.S. and Canada would accept cryptocurrency payments for new and used vehicles and that it would keep some of the digital money on hand.
"The HGreg Group is once again redefining the market by becoming one of the first automotive groups to accept cryptocurrency in its day-to-day operations," the retailer said in a release. "A portion of the revenue from sales made in cryptocurrency will be kept in this format by the company."
Group President John Hairabedian declined requests for an interview to discuss the cryptocurrency effort, but a spokesperson for the company last month confirmed that HGreg was still accepting it as a form of payment.