There are over 6000 A320s (including A318, A319 and A321s) in service performing an average of six flights a day. This incident, like all incidents, is troubling but only because the actual cause is not yet known. Ignore the speculation on Rumour and News because it isn't anything but speculation.
As more information becomes known, as it will when the flight recorders are retrieved, it is likely that recommendations will be made to manufactureres and to airlines which will make this very safe aircraft type even safer.
Flying is the safest way to travel, by an order of magnitude. The most dangerous part of your journey is your drive to/from the airport.