I did have just one bike when we downsized and there wasn't a good place to keep multiple bikes. Although, I have had more than one bike at most points, I only ride one, I get another, sell the previous and repeat. I like buying second hand, gutting them, cleaning them up and servicing and selling it on even if I make a slight loss. Currently I am certainly limited to one bike due to space and it is nice having one which does pretty much everything I need...mostly.