The uptick of boredom induced outdoor leisure caused by banning social activity of all kind and an increase of disposable time. Bicycles seem well positioned to do well in this economy.
Also depending on where you live many people who usually use public transportation and still have to commute opt for bicycles if that's viable.
And those who avoided biking in cities due to safety concerns no longer have so much traffic to dodge.
I can confirm this: whilst I never avoided riding due to traffic before, going for road rides now is amazing due to there being practically nobody else on the roads.
Definitely here I'm considering buying a new Nihola bike, mine got stolen a few years back and I never replaced, but now I need something (as opposed to just want sometimes)