Mr. - Back

Choi Go-bong, a greedy 70-year-old hotel conglomerate president, magically transforms into a 30-year-old man.

The most common reference is the 16-episode MBC TV series starring Shin Ha-kyun and Jang Na-ra. Mr. Back

He is the creator of Hashcash , a proof-of-work system cited in the original Bitcoin whitepaper by Satoshi Nakamoto. a greedy 70-year-old hotel conglomerate president

A mini web series by Certified Rascals that follows the workplace chaos caused by an overzealous backup manager named Naresh. Mr. Back

Because of his technical contributions and stylistic similarities in writing, some believe Back could be the pseudonymous Bitcoin creator, though he strongly denies it . 3. Digital Content & Web Series