Eyes, I'm not sure it's as much about security as the fact that the banking industry doesn't want to work with seed banks.
Or rather, the US government makes it illegal to work with us. I'm sure they'd be happy to take our money, just like they take money from every other retail sector, if it didn't put them at jeopardy.
However, we're just as happy to take cash in an envelope if that's how people want to pay. Bitcoins just speed things up & allow us to get the orders out faster, and it's convenient for people who deal in bitcoins.
I like to recommend it for those reasons, plus I can offer bigger discounts with bitcoins.
~~sherry