Let's say theoretically that you manage to do so; you should be aware that the this reality you traveled from wouldn't exist because you interfered with the past,
creating whole new timeline. That being said, future from that point on would once again be unknown, and the possibility that bitcoin never gets traction it has today would be an option also.
Not to mention xy other paradoxes that scientist predict would happen.
Far better thing you could do is invest today, and prevent future self from creating same thread in the future, wishing you could travel back to 2015.
cheers young troll traveler
Go watch the movie Project Almanac and come back here and comment on if you still think changing the past will make a difference in the future. I personally do not think being rich makes any difference. There are a lot of unhappy and lonely rich people in this world. The most positive thing you might get from a time machine, would be the time itself.
I think being healthy and able to do the things we do are one of the biggest treasures we have. Ask anyone dying from Cancer, what they would want the most, and they would say
Being rich is over-rated. ^Happy^
Easiest counters to time travel paradox:
Theory that every single time you travel in time your consciousness gets sent to a body in a separate universe
Note theory: You left yourself a note or some piece of identification so that future you knows to go back into the past
(not actually preventative measures of paradoxes)
