[throwaway290]

Look for signals and be skeptical I guess. Watch for over-promising. For someone giving advice, try to imagine how they could be paid or gain from selling you on this, or whether they could be influenced by people who do. For someone offering to take your money, do due diligence, look for track record and whether they make legal recourse early available. For example, transacting in cash or something similarly attractive to money launderers could be a red flag. (And yes 98% of subject industry should probably not be trusted so your filter has to be really selective.)