Wish I could speak vietnamese, is there english translation ?

I'd buy Stellar because this coin has much more potential to grow in 2018 than Ripple

Do you plan to develop wallet for Mac Os?

I was really surprised about that, just for 1 night its price has increased in three times maybe the main reason is that the devs are going to release Wraith Protocol this December:
https://coindar.org/en/event/verge-xvg-wraith-protocol-release-604