Escher's Waterfall
Bluelight Crew
The biggest "risk" of all is sovereignty. Though I don't count this as a risk, or potential danger. It is an irrevocable fact, that if we remain our Parliament will continue to be subservient to EU law as it is now, where 50-80% (depending on who you ask) of all our laws are handed down from outside our borders. That is how it is, now. The risk is that if we remain our sovereignty will continue to be further undermined, and the risk is we will just become a satellite plantation of the EU superstate.
Of course, if the Brexit goes through, then any UK sovereignty over the northern half of Great Britain may be in serious doubt.