Future me would not do anything to negatively affect the future of present me - future me would be ruining his own life by doing so. Therefore I trust future me totally.
However, I do like money a lot, soooo........ still no thanks.
Actually, in order for future me to know that taking the money is bad, present me must ignore him and take it. If I don't, he won't ever come back to warn me, so I will take the money, so then he will warn me, so I won't TIME PARADOX!
Ruining my life but getting rich or creating a time paradox with myself as part of the loop?
I'll take the money.
But if I take it anyway, future me wouldn't bother to come back and warn me because it would be a waste of time, therefore as he HAS come back, I must have not taken it. Which creates the paradox.
Both options leave us f***ed, don't they?
My brain hurts now.