Investing in all sorts of scams and gambling can not be a good way to earn money. In such cases, you can immediately say goodbye to the money.
And that's why you should ask yourself, why should you even invest to all sorts of scam? trading is also investing so if you think that it can be a good way for you to earn in trading, choose trading. In gambling, we know there's no decent profit there, you will won some in the beginning but in the end you will lose always what you've got, so go for investing.
Because the HYIPs and other Ponzi sites out there are the most popular sites, especially if you are going to ask newbies about where to invest bitcoin, they are just going to give you their referrals on the HYIP sites where they are investing their bitcoin. I'm not saying that it is bad on investing on those, but if you are going to think about it, it is just a waste of time, and your bitcoin is at risk on this one.
I'd rather go to trading also than this one, which I don't know where are they going to run off with the money that I've invested to them.