Where can I buy AOS crypto?

Excuse me, could you possibly elaborate on where one might go to acquire AOS cryptocurrency? I've been researching various options but haven't quite found a definitive answer yet. Is there a specific exchange or platform that's considered the go-to for trading AOS? Are there any particular factors I should consider before making a purchase, such as fees, security measures, or reputation of the exchange? I'd greatly appreciate any insights you could offer.