:)Best is by far following trends on markets. Test by using only 1 mBTC, and if you're in profit after a week or so, then go gradually with higher amounts.
But the problem is when you invest small amount they will pay you on time to gain your trust and when you go with higher amount then they will simply disappear with your money so its a risk to invest your bitcoins anywhere at a moment.
I agree with you. Now there are a lot of scammers. I have been investing for several years. But I notice that this year many companies that I trusted disappeared. Now it's best to wait and not invest. Just keep it up