You do know there are other ways to invest.. Not just bitcoin or gold, I'd suggest talking to a finical adviser about your investment options.
If you are content with low returns then it is probably best to save your money in a low interest account. It will be insured and is 'safe'.
Gold is a solid investment, the price is quite low at the moment, it seems like a safe long term investment, not very fungible though.
Bitcoin is dangerous, you could lose most of your money quickly, you could also make lots of money. It is fungible, if you can handle the stress of big price swings, it is a good investment in my opinion.
I wouldn't put all my eggs in one basket. I personally am long oil at the moment, I can ride out the overproduction dip, but it won't stay at $50-60 for long, I am willing to bet on that!
It is a great point to know your goals in life specially to your bitcoin. If we are going to compare investing and saving there is a lot difference between the two. Saving is much easy than investing because in investing your bitcoin there is always a risk. And it always depends on how you will manage it. As you said you could lose bitcoin your are right because as i said there is a risk but if you will grab the chance and take the risk i am sure that it will be worth it as you will do your best to manage it to earn more.