For a lot of bitcoin holders looking for a longer term profit, it is indeed a waste to continuously watch prices move sideways.

Though for those looking to pick up some profits on swing trades, it's still helpful to set alerts are key price positions. Most TAs would be setting the alerts at the levels where price breakouts potentially form. Even for the longer term holders/hodlers can benefit from an alert which is set at higher or lower levels.

With that said, I still check the price way too often