I'd probably just shoot my younger self. It's not suicide when it's murder. Or something. Anyway obliterating the universe with a paradox would definitely be a better result than the hell we're currently living in.
Win the lotto for me and a buddy then toss some into investments and properties to sell/rent at a discounted rate following 2019 in comparison to those who inflated theirs. Instead of 2k/m I'll go $1,500 as long as it's still above the profit line I don't need hoards of wealth from it I kinda enjoy working.
Also I'd probably just dump a bunch of money into my kids name to let it start building interest for them.
I'd rather take two more hours to collect some data from the stock markets, and how they went up and down after our beloved lunatic CEO's bigmouth accidents.