"According to the US Census Bureau, the median US household income in 2020 was $67,521. To make that much per year on Twitch, assuming you aren't bringing in money from sources not included in this data, you'd have to be one of Twitch's top 1,322 streamers right now. There are around 8.8 million active streamers on Twitch (via Twitch Tracker), which means you'd need to be in the top 0.015% of all streamers to make the median US household income from direct Twitch streaming revenue. Some of the streamers at that level are live every day of the week for sessions that last anywhere from 2 to 12 hours."
https://www.pcgamer.com/twitch-streamer-income-leak/