A couple of years back when it was looking like the FDA was gonna make a move I bought about 10kg and put it in a refrigerated storage unit the family business rents out.
It never got banned and then I had like 10kg of stale kratom I still haven't gone through.
Depending on your state, I wouldn't bother. States are passing kratom regulatory laws (good thing. Better kratom is 21 or older and regulated.. no more gray area) and it's becoming too big of a business for the FDA to arbitrarily shut down. The AKA gets stronger every year with every kava bar that opens up.
South Florida has them on every corner these days.