Today's blockchain and cryptocurrency news 

Bitcoin is down slightly at $27,464

Eth is down slightly at $1,653

BNB is down .5% at $213

SBF seeks to prevent several witnesses. Jury selection commences in FTX trial.

Rollbit pulled in $38 million in revenues in Sept.

Grayscale seeks to convert Grayscale Ethereum trust into spot ether ETF.

Chainalysis announces a 15% reduction in staff.

Christen Ager-Hanssen, the former CEO of nChain Group leaves over dispute with board.

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