Yes, you need usd...
Just whatever you have on ftx find the pair to put it into usd then you can use that pair to buy KIN...
if you are struggling just YouTube umm...
"how to buy coins on ftx" ...
there will be videos of people doing these processes and once you see the process you will understand that it's pretty easy to do...
all the best,
let me know if your having any problems...
