Where is the best place to buy Kuji?

Could you please enlighten me on where exactly is the most suitable venue to acquire Kuji? I've been hearing a lot about it lately and am eager to invest, but I'm unsure about the best platform to make this transaction. Are there any specific exchanges or marketplaces that you would recommend, given their reputation, security features, and ease of use? Also, is there a specific time of day or week when it might be more advantageous to make the purchase? Your insights would be greatly appreciated.