"I don't imagine friends are talking about when they lost money," said Lee Baker, a certified financial planner and founder of Apex Financial Services in Atlanta.
"The sexy sells," added Baker, a member of CNBC's Advisor Council.
On one hand, crypto can be an on-ramp to more traditional investing — which is generally a good outcome, Mottola said.
There's some evidence of this happening: 36% of new crypto investors said their purchase made them more interested in investing in the stock market, the study found.
However, "the friends recommending [crypto], the sources of information on social media, may not be reliable," Mottola said.