Where can I buy an ASTO token?

I'm curious to know, where exactly can I purchase an ASTO token? I've been hearing a lot about this cryptocurrency and its potential, but I'm unsure of the best platform or exchange to acquire some for myself. Are there any specific exchanges or marketplaces that specialize in trading ASTO tokens? Also, what are some important factors I should consider when choosing a platform to buy ASTO, such as security, fees, and liquidity? Any advice would be greatly appreciated.