In my opinion, As of now it is not advisable to invest your or our bitcoins because IMO it is better if we just keep it safe in our bitcoin wallets rather than taking risk on investments that may turn to scam or get negative profit.
The problem is that many people act impulsively, not doing proper research or taking proper care before investing. The right thing to do is to know the market, and know if there are red flags in the investment.
There are always reports of people who can help to know if an investment is a scam or not, but for that it takes a lot of research.
Investing bitcoins online involves a huge risk as there are not many legit places which will pay you in long term and even if you do a good research its really difficult to trust someone in online world as they may give you returns in short term but you cannot expect the same in long term as you are not dealing face to face.