Nothing, that's because although you'll be able to travel through the time one day (when the technology will be developed enough), you can't change anything in the past. It's calling as the Grandfather paradox.

But, if I will be able to travel to the past before Bitcoins invented, I'll spy top Bitcoin traders, learn tricks and  implement them when came back to the present.

P:S, Are you also Bitcoin trader? If you'll see, 6 feet and 1 inch tall stranger with a 8cm long cut in the right arm. That's me. Teach him everything you know 

Let's assume he made a typo and he meant BTC, because we are on a Bitcoin talk discussion board.  

I think I would have tried to influence Gavin not to talk with the US Government, so that Satoshi would have still been around to express more of his visions and goals for Bitcoin. Satoshi was only around for a few years and remains an enigma to most people.

Roger Ver and Mike Hearn and CW would not have pulled all this shit, if Satoshi was still around.  

The first thing i will do is i will contact with Sathoshi and secure him and then i will help him to catch up his ideas and help him in developing it, I will also try to accumulate as much bitcoin i can thrugh mining as that time it was easy mining that time through GPU.

pow as a concept is simply deillusion, as are the banking cartels, would have been smarter to simply create an open service like ethereum, instead of just a "coin" like ripple did.

Learn to code, go to school instead of bullshitting around waiting for a promotion at dead end jobs. Most importantly, I would learn to invest in myself first, before trying to jump into trading right away. There are way too many things to list. Id' probably do everything differently, especially go to the gym.
Made a new years resolution and still haven't kept it yet.  

if I could go back, i would go deep into IT instead of looking for a job where i get paid little and have my time wasted. Then i will spend enough time on the internet searching for ideas and innovations which i could invest in or bring to my country so i can make profit from it.

if we could go back, i wont make the mistake of just focusing on my job daily. i willl take out time at leats two hours everyday to go make research on what to invest in until i come across bitcoin and when i do i wont critiszie it but quietly invest as much as i can in it

I think I will not do anything different if I were able to go back when Bitcoin was just created. I will still try to get more Bitcoins as many as I can or afford, and I think most people will do the same knowing that in few years it will gain more value since you will be back from present to past. And I'm not an influential person that can change anything about Bitcoin or anything that can change what governments thinks about it, so there is really no possible change that a simple person can do, unless you are part or one of the people that helped satoshi nakamoto to create Bitcoin.

With my current knowledge about cryptocurrency or just going back again? If it is going back again without my current knowledge about cryptocurrencies of course nothing would change but going back to start with my current knowledge I think I'm going to implement my own coin with a system of PoS since I don't want to waste electricity to create a virtual currency also creating an advance system before the creation of Bitcoin is an advantage maybe my coin will be the top if that's possible lol