KEY POINTS
  • “Should I buy bitcoin?” was a popular conversation starter at Thanksgiving dinner tables last year.
  • But those who did get into the cryptocurrency around the 2017 holidays might not be as enthusiastic this year — bitcoin is down more than 45 percent since last November.
  • "At some point when the price went up by so much, so quickly, people had no choice but to peek under the hood and see what was going on," says Steven Ehrlich, chief operating officer at Wall Street Blockchain Alliance.

The old advice to keep politics and elbows off the dinner table may need to be updated to include bitcoin this year.

Last year at this time, the cryptocurrency was just entering its hot streak, soaring in price because retail investors were buying. But it's likely to be a sore subject for people who bragged during last year's holiday feast about their new investment idea.