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Bluetooth is a wireless specification. It is implemented by tens of thousands of tech companies, so you can't isolate a company or sector that stands to gain in any way by new developments or growing interest in Bluetooth. It's developed by the Bluetooth Special Interest Group that ensures certification and standardization but they're not for profit. You may want to look into companies that are leading the way or innovating in 'Internet-of-Things' - e.g. around smart, wireless, internet-connected devices. Improvements to Bluetooth is enabling IoT is becoming more pervasive.