When the crypto bubble pops, remember the day Burger King launched WhopperCoin

If you’re looking for signs of a bubble in digital currencies — and you need more than bitcoin’s 700%-plus rally over the past year — you might want to check out what’s happening over at Burger King in Russia.

The fast food giant just made its foray into the burgeoning crypto world by offering “WhopperCoin,” billed as a “blockchain loyalty program” that earns customers one coin for every ruble they spend on a Whopper.

Once they gather 1,700 whoppercoins, a free burger awaits.

Crypto-cash startup Waves, Burger King’s partner, recently said in a press release that it would make Apple AAPL, -0.03% and Android apps available next month so whoppercoins can be freely transferred and traded online.

Here’s the money quote from Burger King Russia’s head of communications:

“Now Whopper is not only burger that people in 90 different countries love — it’s an investment tool as well. According to the forecasts, cryptocurrency will increase exponentially in value. Eating Whoppers now is a strategy for financial prosperity tomorrow.”