What is his golden finger?
Not a system, not a space, not a panacea.
It is a brain that has received sixteen years of modern education. It is the logical thinking and information integration ability honed in the Internet era. It is the mathematical and physical foundation laid by nine years of compulsory education. It is the practical experience summed up after reading countless time-travel novels.
These things, in this era, work better than any golden finger.