Originally Posted by: nandre1276

But is it ok if my fingers instinctively place one by one or should I force them to place at the same time even if I practice slower?[/quote]

It's a necessary first step for some students. But you should gradually work toward placing them together because that's the logical progression of skills required to play music in time.

[quote=nandre1276]To be honest I thought a lot about it and my conclusion was that placing finger one by one is a bad habit because now my brain does it like this

It's only a bad habit if you never try to advance to placing them together. But for some students & some chords it is sometimes a necessary first step.

If you can play the chord by placing all the fingers at once, that's great! You've made the necessary progress. Keep practicing!