Maybe lack of capital is a factor, but doesn’t that only come into play if redemptions are large? If it acts as a currency in circulation, there can be very little actual capital backing it (like how fractional reserves work for regular banks, IIRC).
No, but that's hilarious. Good catch!
I don't think "wildcat banking" would be known as that if the banks hadn't been poorly capitalized (as in, they didn't have the money). If the banks had actually worked out, we'd just be calling it "banking".
Today, stablecoins have a hilariously simple way to print money: just buy treasuries, money market funds, or whatever. We're not necessarily going to see them collapsing due to poor capitalization.