Don't even think about it. You'll just end up like the rest of us, with a time-travel-related existential crisis. What happens if I go back in time and kill myself?
Sorry, prophets of doom are like, soooo last season. You'll probably just end up in a crowded market somewhere, trying to haggle over the price of papyrus. Prophets of Doom
You'll just be stuck in an endless loop of Blockchain Investing tutorials. Good luck with that.
Don't even. You'll just end up like Toilets of Doom, regretting your life choices.