I have 3 places I store my bike & have never had a problem with anything bad happening to it at any time. I ride a short wheel base Vision R40 recumbent, so it is a bit longer then a wedgie diamond frame bike.

The first place is in the dinning room leaning up against the wall. I leave it here during the months I ride outside. Second is on the trainer next to the couch so I can see the TV when I ride, I have it here for when I ride the trainer a few times in the cold months. Finally is on a hook in the basement. I hardly store it there though. The reason is it is a huge pain in the ass to carry my recumbent up & down the basement stairs & the turns at the bottom is difficult witht he bike too.

But I have never had a problem when I get the bike to where it is going to be stored in either of the 3 places I use in my home. Just one thing to remember, regardless of where you store it try to keep the tires filled with air, especially if you store it on the floor leaning it up against the wall.