If you could go back in time you would have so many possibilities to make money that Bitcoin would be of absolutely no interest to you.
What other opportunities have yielded as much profit as Bitcoin did between 2009 and 2013? Apple stock? Uranium futures? I don't think any of them come even remotely close to Bitcoin.
I guess Litecoin and the NXT IPO have yielded greater profits percentage-wise but they're pretty much in the same boat as Bitcoin.