Thank you all of you's advices! After I think a moment later, I will invest more on bitcoin. As the potential of it is higher and as I am still young, I can withstand a higher risk I think. But one problem is that, if I want higher return, how can I do? As I my living place, buying a small house/flat is very expensive, it need over $1000000 usd, but my income is just only around $2000 usd. Can I made $1000000 by investment?
You need USD 1.000.000 for a place to live? With an income of USD 2.000? Well, then maybe check your standards? I'd also love to live in a nice huge place that costs 1.000.000 and comes with a cleaning lady, a cook and a nanny. It's just not realistic. Of course you can have dreams.
And as you're already in STEEMIT, why don't you buy some STEEM as well, power them up and compound your earnings by curating. Google compounding. It's VERY powerful long term. You're very active already and with a boost of bought STEEM you can make a nice head start. Rest you put in Bitcoin and a bit in physical gold and silver (don't forget silver when talking about gold. I think it has bigger potential to grow in value).