The only real thing to discuss here, is when if ever you would get the four silvers. To have gotten provinces your coin economy is already fairly decent (unless it took you like a chain of 4+ tournaments to get it) so absent a feodem situation, why would I ever want 4 silvers rather than either +2 coins or + 2 cards? i guess if you have like mega draw, princess and bank i could see it. But one reason no one is discussing this is that almost no one ever even gets the silvers. I think I may have done it once. But i'm not sure. And I've played this card 100's or times if not more.
There are lots of options:
Forge bait (e.g. get a plat from three, or pair up with the estate from Followers for a province). For the price of 2 draw you can get 4 gains & $12 value. Slightly less flexible but doing that with Workshop requires 4 draws and 4 actions. If you need lots of value for some scaling TfB ... Stead is an elite level gainer.
Convert them into +buys (and +coin) with Forager/Spice merchant, particularly good if Princess is the only other +buy
Bishop bait, without draining short piles; Followers drains two piles so a long Bishop come-back (say by locking them with Rabble/Followers) is hard, particularly if they snag Bag. Other heavy trashing scenarios are possible, but Bishop is one of those cases where you really do want to trash a huge amount of copper. Tomb is another option for similar reasoning. Of the treasure gainers, few are as potent as Stead for TfB.
Keeping a good Stables/Magpie/Story teller to treasure balance, particularly if you are trashing coppers for anything. One play of Stead every few Stables gain is pretty effective at both increasing you reliability and your overall payload. With Storyteller, each silver is pretty close to being a Lab.
No draw games. You can get Stead not to hard on boards with say trashing (e.g. Chap) and no net draw outside of prizes (e.g. no Moat/Smithy/Lab/etc.). It isn't too hard to get fast Prizes, but once you start duchy gaining you will quickly tank your money density. Steed is better here than Bag and if you also have Followers is vastly better at building out money.
Quick cash infusion. Suppose you build up Province with some combo of TfB (e.g. Moneylender) and Tournaments; once you both start having provinces and you run low on TfB targets, your engine crumps without a new cash infusion. Buying $8 worth of coin is typically a two turn proposition. Steed does it in one. If draw is cheap (e.g. Hgrounds, Rsmithy/Chap, or Kc/Pearl diver) you are often better taking the silvers and just buying more draw.
Fishing for top deck. Obvious case is Star chart to hit some other clutch card (e.g. a unique card in a Hop game game, a Count after burning a couple of Madmen). More commonly if you track your deck and this is your best option to win you may well want to burn your draw deck to place potentially winning cards back in the discard back into draw position (e.g. you have a lead, one colony left, two Pdivers in hand and two Remodels in the discard, no coin in hand).
Counterfeit, Swashbuckler ... there are a huge number of potential combos.
All that said, I play many games without ever touching the option. However, when it is useful, it is often extremely clutch.