41-year-old Anthony Constantinou offered returns of 60% per year to investors.
FX
LMAX is cashing in after a 340% rise in crypto trading volumes to $500bn
The number of call options has dropped, but hedge funds lean slightly bullish on the pound
Crispin Odey has said he correctly bet on the pound's plunge. Options data show many of his hedge fund peers were net long
Impoverished nation is defying warnings against using volatile bitcoin as official currency alongside the US dollar
Also this week: Tom Hayes has career advice for juniors, and Deutsche Bank made promises on bonuses