The La Liga competition is still very competitive, Barcelona is certainly not safe at this time because the difference is only 3 points. Moreover, the two teams are still facing each other, at the beginning of the season Real Madrid was also far behind Barcelona then they managed to overtake Barcelona at the top of the standings and now Barcelona has managed to overtake Real Madrid again at the top of the standings because Real Madrid has not been consistent in the last 5 matches.
For me the key for any team to win La Liga this season is consistency. The title race is still wide open and although Barcelona might be leading at the moment, maintaining their lead won't be an easy task, especially since the points difference is only three points. Both Real Madrid and Atletico Madrid are still strong contenders and with the competition getting more intense, it will be exciting to see who comes out on top at the end of the season.