> How on earth did he get £16Billion?
He never had $16B. That was just bad reporting.
He owns a large stake of FTX, which turned out to be worth zero, and he owns a large state of Alameda Research, which turned out to be worth zero as well.
He has some other assets, but according to reports, he also has a lot of debt.
His real net worth could easily be negative. That is lower than that homeless guy living under the bridge.