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I would be pretty much worldwide. I am going to be using the same provider that Cake Wallet does. Not sure if it's the same providers as Bitrefill, because they have larger maximums, but with having to front money for it, I am glad there is a 100 limit, lol. I have to put up money first, then hope I sell them.

Best part of all, THEY ACCEPT CRYPTO PAYMENTS! So I don't have to go out into fiat like some of the others I have been looking at.