If you want investment with great return, chose BTC.
With Bitcoin, I am not sure whether I will get any return or not.
You can't predict the future of Bitcoin, because it is relatively new. There is a good chance that the value of Bitcoin can go up by several times in the near future. But there is also a very significant chance that it can become worthless.
the fact that bitcoin is still a relatively new currency/investment says enough. there is a huge amount of potential profit that we can make when investing in bitcoin and hold it for a few years.
Well both items can be mined but no they are not the same. Gold being the leader in value since ages is clearly the winner.
But bitcoin is a good runner up. Maybe even the winner since it is so young.