Money is the only answer.
50 years in the past will put be back before I'm born and I won't want to go back at my current age because life was shytty back them and boring...only to be like 70 or 90 or some shyt after the new millennium.
50 years in the future would fukk me over because I'll probably get no p*ssy because I talk like a grandpa and don't know shyt about the culture.
The money could buy all the shyt I need and then some...I could live great and leave an empire for my kids.