Pretty sure they don't mean Bitcoin. Even if they were looking at cryptocurrency - unlikely - they'd roll an alt rather than use a currency with 10% of the supply potentially controlled by its unknown creator. Bitcoin as world reserve currency would make Satoshi a world power overnight.
I'm betting he/they are Chinese, educated abroad. It would be a masterful false flag, because of the Chinese/Japanese tension, while China gov has been hinting at a new world reserve currency but not actually saying BTC yet, to reveal they have so much of the initial BTC.