My sister wants to invest into this project:
https://www.dxrcointrade.com/ but for me it looks like a scam... can you guys help me get redflags? what you guys think?
This is a redflag merely looking at the webpage.
The best form of investment in todays world, is by going to the coinmarketcap and looking at the top altcoins existent on the the cap.
Also learn to avoid crowdfundings at all times, and continue to dyor.