Since Real Madrid are able to share the points with the Barcelona there’s possibility that will soon take over the top of the standing from the Barcelona, because their in the best form not mean say they can able to maintain that first position, as you said earlier that their position is shaking is true as they can see that Real Madrid have close the points gap with them that’s what is causing the shaking of their position.
Furthermore, Barcelona has a lot of work to if they really want to keep staying in top tables, but given them a higher hope to win this La Liga league that’s what I never sure of it; because their best form you stated earlier is not up to that percent to have confidence on them.
You seem to be worried about Barcelona losing their top league position because they have the same number of points as Real Madrid, instead of Barcelona winning the league title over Madrid. However, Real Madrid should be afraid of missing out on a chance to win the league title this season; they have the same point as Barcelona due to Barcelona's missed game against Osasuna; if Barcelona wins the next postponed game, they will be three points ahead of Real Madrid.
Furthermore, Barcelona teams have developed into something new this season. Hansi Flick has transformed this team into a demon that destroys every opponent it faces. As things stand, I don't think any club will be able to stop Barcelona from winning the league title this season, neither Real Madrid nor Atletico Madrid were able to compete with them. Let's see what happens with the few games left this season.