I think that at this time it is difficult to invest safely to make a profit. Be careful with HYIP projects, Ponzi, because it's so dangerous, it can cost you all the money you have. To earn Bitcoin and get the profit from us think you should join the business and trade some kind of altcoin, of course you will have to learn to have experience doing those things. If you know business it can help you make a lot of money. You can also join the signature campaign in the forum to earn more Bitcoin 
There are more investment like casino sites. Most of the newbies in bitcoin are investing in HYIP because they think this is the fastest way to make money they are not aware that HYIP is s scamBecause they doesn't aware of investment methods of bitcoin and its pros and cons. Gambling investments like casino,dice and etc are also compared with the ponzi schemes.
Moreover newbies has to learn more about bitcoin initially. Once they settled in all the aspects of bitcoin then they could have try various platforms in bitcoin.