Lionel Laurent, Columnist

Google's Ad Ban Leaves Twitter With a Crypto-Challenge

Jack Dorsey faces a split personality problem in Bitcoin.
Photographer: David Paul Morris/Bloomberg
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Google's decision to ban advertising for cryptocurrencies and initial coin offerings puts Twitter Inc. CEO Jack Dorsey in an increasingly awkward spot.

The founder of the social network is under pressure to follow Facebook and the search giant and crack down on misleading ads for potentially loss-making products. Yet Dorsey might have reason to resist: he is also CEO of Square Inc., which recently began to offer Bitcoin trading and which is eyeing more crypto-investments. He should choose between the two jobs.