Charles Hoskinson: "Wave of Failures" is Coming to Cardano Ecosystem

These are our top stories today:

• Cardano's TapTools winds down as Hoskinson warns more ecosystem projects will fold
• Sui blames triple mainnet halt on gas-charging bug and risky patch
• Solana ships native payments rail for subscriptions and allowances
• BlackRock BUIDL pushes Avalanche's tokenized-asset total past $1.16B
• Mastercard opens card settlement on 8 blockchains with weekend cycles

It's been a brutal couple days for Layer 1s.

TapTools, the analytics platform that became the default front-end for the whole Cardano ecosystem, yesterday said it’s winding down within two weeks. Today, DEX aggregator SteelSwap followed with the same news. Worse, Charles Hoskinson responded by warning that more Cardano projects will fold this year. NFT marketplace JPG.Store has shut down earlier, and the chain now sits 28th by TVL.

Then there’s Sui, which halted its mainnet three times on May 28 and 29. The post-mortem is unusually candid: an upgrade carried a bug that prompted two halts, and the third came from a fix the team shipped knowing it carried halt risk. They wanted the chain back fast. They got it back and then it broke again.

And Zcash, which we didn't cover, so here's the catch-up: it pushed an emergency hard fork after a researcher found a bug that could have enabled double-spends. There were no funds lost and no evidence the bug was exploited but the fix made the chain temporarily unstable while ZEC is up more than 1,200% on the year.

You could chalk it up to "alt L1 winter,” but even Bitcoin is bleeding: it slid to a two-month low after Strategy sold 32 BTC, its first sale since 2022, finally cracking Saylor's never-sell gospel and spooking the market that built itself on it. So even the safe-haven leg is wobbling.

Cardano is dying of from lack of use. We recently covered how Polkadot is suffering from a similar story: Its monthly users collapsed from ~230,000 in early 2024 to under 40,000 by April. Great tech but nobody’s home. For Sui, this is the third halt episode since late 2024, and the team admits it shipped a risky patch just to get back online. A chain breaking on the complexity it keeps adding.

Zcash will likely unsettle people the most. It cracked at the height of a rally, mid-ETF-filing, with a bug that could have minted value from nothing.

Fading into irrelevance is the L1 failure we already know how to price. The scarier option is the unknown bugs, halts and, (let’s hope we don’t see this) exploits.

Read more below!

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WATCH LIVE TOMORROW

"ETH IS MONEY" — IS THE THESIS OVER? | David Hoffman vs. John Gillen

Tomorrow at 11:30 AM ET, Camila Russo moderates a debate between two of Ethereum's loudest bulls who just ended up in opposite trades. David Hoffman, co-founder of Bankless, exited his entire ETH position after nearly a decade — arguing the thesis played out, with value leaking to L2s, apps, and stablecoins. John Gillen, lead macro researcher at Milk Road and a former BlackRock strategist, fired back with 'Wartime Ethereum' — calling it too early to write the game off and doubling down by staking.

Two ETH bulls, one sold the stack, the other doubled down. Worth watching live for the questions: where ETH actually accrues value in the L2-and-stablecoin regime, and whether the monetary-premium argument has anything left in it.

BLOCKCHAINS

Cardano's TapTools Winding Down is a Symptom of a Shrinking Chain

The TapTools shutdown announcement closes the most-used analytics platform on Cardano two weeks from now. The team cited a fifth senior-executive departure inside twelve months as the trigger. Founder Charles Hoskinson posted a same-day video acknowledging that more older Cardano-ecosystem projects will fold this half — a sharp shift in tone from a founder who has typically pushed back against contraction narratives.

Why this matters: Analytics infrastructure is a leading indicator for chain health — it follows developer and trader attention. Losing the default dashboard the same week a flagship founder publicly concedes more shutdowns are coming reads as the contraction moving from rumor to operational reality. The signal is more useful for L1 capital-allocation thinking than for ADA price direction.

BLOCKCHAINS

Solana Ships Native Payments Rail for Subscriptions and Allowances

The Solana Foundation deployed a single onchain program that any merchant, payroll operator, or wallet can build recurring billing, capped agent allowances, and contractor pulls on top of. The primitive sits at the rail layer — closer in shape to Stripe Billing, Recurly, and card-network mandates than to a wallet-side abstraction. Agent allowances are the more novel piece: a wallet can authorize a bounded, revocable stream to an AI agent or third-party service without giving up key custody.

Why this matters: Recurring payments and capped agent spending are two of the concrete use cases that have been waiting on a rail-layer primitive instead of being patched together app-by-app. Solana shipping it as a base-layer program is the strategic move that keeps a third-party protocol from owning the slot: the Foundation claims a primitive every consumer-payments app on the chain will depend on. Compare with the L1 contraction story above — chains that ship primitives extend their developer base; chains that lose their analytics team don't.

DEFI

BlackRock's BUIDL Pushed Avalanche's Tokenized Asset Total Past $1.16B

A single allocation of BlackRock's $2.85B BUIDL fund pushed Avalanche's distributed real-world-asset total above $1.16 billion this week, a 58% two-week jump. The allocation accounts for more than half of the chain's RWA on its own. Avalanche now sits behind only Ethereum on institutional-tokenization venue rankings, ahead of Polygon, Stellar, and the smaller chains that have been competing on RWA volume.

Why this matters: BlackRock concentrating a slug of BUIDL on Avalanche is a venue selection signal more than a market move. Ava Labs has been pitching its subnet model and EVM-compatible settlement to institutional issuers for two years; the BUIDL allocation is the concrete result of that pitch landing. Pair it with Solana shipping the payments primitive above and a clear pattern shows up: institutional and developer capital is rewarding chains that ship measurable product, on the same week Cardano's analytics team turns the lights off.

BLOCKCHAINS

Sui Blames Triple Mainnet Halt on Gas-Charging Bug and a Known-Risk Patch That Backfired

The Sui Foundation's post-mortem attributes two of three recent outages to an edge case in the v1.72 address-balances feature, where gas charging for failed transactions wasn't being applied — letting attackers spam the network without paying. The third halt is traced to a randomness-state bug exposed by an interim fix the team shipped knowing it carried halt risk. Three full mainnet stops inside a single outage window.

Why this matters: The post-mortem is candid — the team writes that they shipped a fix knowing it carried halt risk because the alternative was leaving the spam vector open. Reliability is a leading indicator for the kind of institutional flows BlackRock is sending to Avalanche this week. Chains with active production-incident playbooks don't get on Mastercard's settlement chain list (below) or get BUIDL allocations. Sui's path back is execution stability — not narrative.

TRADFI AND FINTECH

Mastercard Opens Card-Settlement Network on Eight Blockchains, Adding Weekend and Holiday Cycles

Mastercard's new card-settlement network lets issuers and acquirers clear card transactions directly in regulated stablecoins across Arbitrum, Base, Canton, Ethereum, Polygon, Solana, Tempo, and XRPL. The launch ships with five named first-adopter banks — ARQ, CBW Bank, Cross River, Lead Bank, and Nuvei — covering the US and Latin America. The architecture also introduces weekend and holiday settlement cycles, which the traditional rails don't run.

Why this matters: Mastercard's chain selection is the most expensive vetting process most L1s have access to. Eight chains on the list, two of them (Canton, Tempo) institutional permissioned networks, the other six the public chains the network is willing to settle into. Cardano and Sui are not on the list. Avalanche is not on the list either — its BUIDL story is downstream, not card-rail. Combined with the same-day Cardano shutdown news and the Solana primitive ship, this is the L1 hierarchy as written by capital and counterparty risk, not by tokenholder sentiment.

Other Stories Worth Your Time

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