Tesla boss Elon Musk gives wrong Signal, as consumers dump WhatsApp over ‘badly timed’ decision

No-one had heard of this small American company called “Signal Advance” until last week — when Elon Musk accidentally made it famous.

In a deceptively cryptic tweet, the world’s richest man told his 42 million followers to just: “Use Signal.”

Many of them followed that order blindly, and it led to a very expensive mistake.

They thought Mr Musk was telling them to buy shares in a small medical device firm (Signal Advance). So they did,…