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* Bitcoin cautiously higher Thurs after bounce off 23.6% Fibo
* Primary support at $58,115 critical for near-term direction
* Failure to close above exposes Bollinger downtrend channel
* If it ends below $57,053 bearish bias will take over
* SEC says 'no' to leveraged bitcoin fund - WSJ
* The first SEC-approved ETF earlier triggered BTC record high
* For more click on FXBUZ
(Ewen Chew is a Reuters market analyst. The views expressed are his own.) ((Ewen.chew@thomsonreuters.com))