Where can I buy BNB smart chain?

Could you please elaborate on the avenues available for purchasing BNB Smart Chain tokens? I'm interested in investing in this cryptocurrency but am unsure of the most secure and reliable platforms to make the purchase. Are there any specific exchanges or brokerages that you recommend for acquiring BNB Smart Chain? Additionally, what are some of the key factors I should consider while selecting a platform, such as security, fees, and supported payment methods? Your guidance would be greatly appreciated.