MTL - Monster Hunt: Notes From a Hunter - Chapter 654 big money

Lucian Black awakened to be the most powerful hunter in the world, but he even with all these powers, he could not protect that which he holds dear, and had to watch her die.Devoid of any feeling, he decided to focus his hatred on the monsters that caused all his suffering, and he became a killing machine until one day, he was betrayed and poisoned by those he works with but fate had another plan in store for him as he returned back to the day of his awakening, the day he awoke the most broken ability in the world.With this second chance, he vows to protect his sister and find out what really happened to his parents.

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

I was reborn into a chaebol family.Into a time with no cryptocurrency, no internet, and nothing else.