I don't think I'd risk time travel. Ironically, time travelling is one of the super powers I've always wanted, but when I think of the consequences of it, it feels unethical to me.
If you have a significant other, and you travel forwards in time, you cease to exist in the interim. You essentially abandon the one you love for that entire timespan. I couldn't travel forwards in time, knowing the hurt my actions would cause my partner - even if I explained what I was doing and why; I don't think any excuse or justification would be worth it. This doesn't matter if you intend to return, of course, provided that you can choose to return at pretty much the time you left. My actions would therefore create (or rather, perpetuate) an infinite causal loop. In that instance, I'd probably just get the euro millions numbers from the most profitable draw date, and see if they'd stay the same for me to bet on them.
I'd be too afraid of travelling back because I might inadvertently interfere with the relationship I currently have.