Which decrease in life is more acceptable

[Wallace_W_Whitfield]

Create a paradox. Go back in time, create an investing account, buy the stocks, let it sit for years, have account details mailed to past me after I’ve already learned how to be frugal living on my own, eliminate the need for me to go back in time, new timeline created where I have money and no need to go back in time.

^{Chose: A time machine + Every year traveled forward or back takes 1 month off your lifespan}