Full explanation
Other Mystery Reveal symbols pay their own value and that is it. A Coin is worth its 0.2x to 100x, a Diamond its 150x to 500x. The Pot of Gold works differently: it collects the value of every Coin, Diamond and Clover currently on the grid and pays them all to you in a single hit.
That is why it is the symbol you actually want to see. Its payout is not a fixed number, it is whatever the rest of the board adds up to at that moment. Land a Pot when the screen is loaded with high coins, diamonds and a couple of clover multipliers, and a single symbol can be worth more than the rest of the spin combined.
The clovers are the multiplier piece, ranging from x2 to x20, and they apply to the collected values. So the dream sequence is a busy board, a fat clover, and a Pot of Gold to sweep it. That stacking is the realistic route to the upper payouts and, in the right bonus, the 20,000x cap.
Short version: every other symbol pays itself, the Pot pays the whole table. That is the entire difference, and it is a big one.
The dream board, briefly
Picture the grid loaded with several Coins worth 20x to 50x, a Diamond or two in the 150x range, and a x10 Clover sitting among them. On their own, each pays its own value. Then a Pot of Gold lands and collects the lot in a single sweep, with the clover multiplying the collected total.
That single moment is where a modest spin turns into a session-defining one, and it is the realistic path toward the 20,000x cap. You will not see it often, but understanding why the Pot is special tells you which symbol to hope for when a Mystery Reel resolves.
When a Pot of Gold lands on a busy board, that single reveal can outweigh a dozen ordinary spins, which is why the feature feels so swingy. You cannot summon the moment, but understanding why it matters helps you read your own session. The big jumps come from collection events, not from the steady trickle of small wins.