OpenSea Packs· PSA Vault
Open packs of PSA‑graded cards.
Every pack is a real slab in the PSA Vault. Sell it back instantly at 95% — the category stops at 90%.
Sell‑back95%
Pack EV99%
Marketplace fee0%
Independent concept study
Four product concepts for OpenSea.
Graded‑card packs, perpetuals, collectibles and prediction markets — designed on OpenSea's own system and built as a working prototype you can use.
Dan Weingart · Product design · Aug 2026
Markets home · live prototype, one balance across four verticalsFive‑minute tour1Trade BTC, see the fee box2Pull a card, sell it back3Verify, then buy Yes4One balance, four verticals
Four concepts, one balance
OpenSea Perps· Hyperliquid
Trade perps from the same balance.
180+ markets on Hyperliquid's book, with a 5 bps builder fee itemised on every ticket.
OpenSea fee5 bps
Max leverage40×
CustodyNone
OpenSea Cards· Collector Crypt
Graded cards: packs, market and vault.
OpenSea's own tier ladder on Collector Crypt machines. Odds and expected value sit beside the buy button.
Buyback85% · 72h
Stated EV93%
Marketplace fee0%
OpenSea Predict· Kalshi via Apex
Yes or no, on the game or the Fed.
Event contracts on a regulated exchange. Prices are probabilities, and OpenSea's share of the fee is shown as included — never added.
Payout$1 / contract
Fee0.6 – 1.75%
EligibilityPre‑render
Unified balance · in the global navThe thesis
One balance funds everything.
Without a shared layer these are four integrations sharing a logo. One USDC balance, progressive KYC, and a single fee component that always itemises the partner's cut and OpenSea's — that is what makes it one product.
What it shows
01Concept → launchFour end‑to‑end flows, including the states nobody screenshots.See it02Systems thinkingOne measured design system builds all four surfaces.See it03Product senseEach concept priced on its partner's real economics.See it04AI‑native craftAudit, spec, canvas, code — two days end to end.See it
Mobile‑first
The same product at phone width.
The icon rail becomes a thumb‑zone tab bar, settings move into a bottom sheet, the trading terminal stacks chart over ticket, and the balance collapses to one line with a segmented allocation bar. The frame on the left is the live prototype, not a picture — scroll it.
Simulated data, no real transactions — connecting creates a sandbox account. Press N on any screen for the design notes behind it.