It all depends on (a) whether you believe in EOS long term or not and (b) whether you need the money in a foreseeable future. The token sale is over in 308 days, after which I personally expect price to go up. Unless you need that money for something else, I'd keep the tokens beyond this time frame. If, however, you need to sell, I'd say say at about $1.85/1.90 - a price level that is touched quite regularly at the moment. Good luck with it, no matter what you end up doing.