Where is the best place to buy Harmony One?

Could you please advise me on the best venue to purchase Harmony One? I've been exploring various options but am still uncertain as to which platform offers the most secure and reliable transactions. Would you recommend a centralized exchange or a decentralized one? Also, are there any specific factors I should consider before making a purchase, such as fees, liquidity, or customer support? I'm quite new to this and would greatly appreciate your expert opinion on this matter.