Well I'm not sure how is it possible to identify the scammers as they can be anywhere. For some time I've interested in investing crypto Exchanges like one of my first was Exscudo long time ago even though they are not in the coinmarket cap yet but they are still kicking, right now I'm aimed at DexAge.io they are building decentralized p2p ecosystem exchange and currently holding a token crowd-sale as well. I'm sure there are some companies that are good too but again it's your choice and your risk.
I also consider purchasing DXG, I have read a white paper, but I still can not say exactly whether they will be successful or not.
Can someone advise something?