Most digital currencies are unlikely to survive in their current form, and investors should prepare for coins to lose all their value as they’re replaced by a small set of future competitors, Goldman’s Steve Strongin said in a report dated Feb. 5. While he didn’t posit a timeframe for losses in existing coins, he said recent price swings indicated a bubble and that the tendency for different tokens to move in lockstep wasn’t rational for a “few-winners-take-most” market.

“The high correlation between the different cryptocurrencies worries me,” Strongin said. “Because of the lack of intrinsic value, the currencies that don’t survive will most likely trade to zero.”