Earlier quoted context omitted.
I'm aware that tether's reserves are a little doubtful, but could you elaborate on why Bitfinex is sketchy?
For starters, they don't deal in USD at all. They deal in "USDT", which isn't at all USD but a token called a tether that is somehow magically supposed to be pegged so 1 USDT == 1USD that you can... well... I dunno what you can do with a tether but one thing you can't do is turn it into actual fiat money on Bitfinex. You might be able to convert it to cold hard fiat on some other exchange though, but odds are good sa…
The only way that Tether should be considered backed by and equivalent to USD (risk-reduced) is if Tether is contractually obligated to convert it back into USD. Instead, this is what their TOS says:
> Tethers are not money and are not monetary instruments. They are also not stored value or currency. There is no contractual right or other right or legal claim against us to redeem or exchange your Tethers for money. We do not guarantee any right of redemption or exchange of Tethers by us for money.
> We make no representations, warranties, or guarantees to you of any kind, including with respect to any right of redemption or exchange of Tethers for any property.
For more on this, see my previous comment exploring the idea of "Tether being worthless": https://news.ycombinator.com/item?id=15997658