By Kimberly Butler Bitcoin holds at $21k after shaky start to the week Bitcoin continued to drift back towards $20k yesterday, as investors brace for the US Federal Reserve’s expected 75 basis point rate hike. The largest cryptocurrency by market cap was changing hands at about $21,368 at time of writing, up about 1 per cent over the past 24 hours but down more than 8 per cent since this time last week. Other major cryptocurrencies also had a bit of a rollercoaster day, with Ethereum sinking as low as $1362 at one point. It’s since recovered to $1463 at time of writing, up 3 per cent since thi…

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