Ethernet and WiFi for the intents and purposes of almost all IoT are infinitely capable.
Bluetooth can stream audio but is not suitable for video or other large data transfer.
2.4 Ghz mesh networks such as Wirepas, Bluetooth Mesh and Zigbee can support massive networks, where each device typically sends small amounts of data every few minutes or so.
Sigfox and LoRa send data much less frequently than that and dictate that the payloads must be very small.
There are exceptions to the above but by and large these are the orders of magnitude that these technologies operate in. In practice though many IoT applications are not very bandwidth intensive. The choice then comes down to factors such as reliability, battery life, scalability and available hardware.
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