privacycoins

$ZEC 数日で価値が半減。何が起きたのかを解説します。
$ZEC Orchardプライバシープールの重大なバグが公表された後、数日で価値がほぼ半減しました。現在、Binanceでは約1,227ドルで取引されており、24時間で7.8％下落しています。この問題をめぐる状況は、その後大きく変化しました。
📌 ニュース
The Blockによると、セキュリティ研究者のテイラー・ホーンビー氏は2026年5月29日、ZcashのOrchardプールに重大な偽造脆弱性があることを特定しました。この脆弱性を悪用すれば、偽のZECを無制限に発行できた可能性があります。同氏はAnthropicのOpus 4.8モデルを使って発見したとされ、Zcash Open Development Labのエンジニアに報告しました。数日以内に修正が行われました。

まずはいくつかの数字を見てみよう。

2024年11月の半減期で、1日の発行量は約3,600枚から約1,800枚に半減した。‌

SECの調査は2年以上続き、2026年1月に正式に終了。罰金も、是正措置も、執行措置もなかった。

グレースケールのZcash ETFは、上場から30日で運用資産が10億ドルを突破。過去10年間のETFの初月規模で上位1％に入った。‌

3つの独立した出来事が、同じことを示している。Zcashでは供給が縮小し、規制面では締め付けが緩み、資金が流入している。暗号資産市場で、こうした三重の共鳴は珍しい。

① グレースケールはETFを立ち上げただけではない。実際の資金を投じて支持を示している

What if crypto’s next major narrative is not another meme coin, but something increasingly difficult to preserve: financial privacy?
Zcash is returning to the spotlight as its NU7 network upgrade approaches. The proposed changes could make the network considerably faster, strengthen its shielded infrastructure and reignite interest in $ZEC .
But does this represent a genuine opportunity, or another narrative-driven rally investors should approach cautiously?
What makes Zcash different?
Bitcoin is often described as anonymous, but its blockchain is actually highly transparent. Transactions, balances and wallet movements can be examined publicly.
Zcash offers users two alternatives:
🔎 Transparent transactions that function similarly to Bitcoin transactions.
🛡️ Shielded transactions that use zero-knowledge proofs to conceal information such as the sender, recipient and transaction amount.
Unlike $XMR , where privacy is enabled by default, Zcash allows users to choose between transparent and shielded activity. It can also support selective disclosure, allowing a user to prove specific information without revealing their entire financial history.
This combination could become increasingly valuable to individuals, businesses and institutions that require confidentiality without completely abandoning auditability.
The NU7 catalyst
The upcoming NU7 upgrade could reduce Zcash’s target block time from approximately 75 seconds to 25 seconds.
That means:
⚡ Faster initial confirmations
🏪 A potentially better payment experience
🌉 Improved usability for exchanges and cross-chain bridges
🛡️ New limits designed to protect shielded wallets from spam
NU7 is also expected to introduce changes intended to support the network’s long-term sustainability while preserving Zcash’s 21 million maximum supply and existing halving schedule.
However, faster blocks alone will not guarantee wider adoption or a higher $ZEC price. The market must still see meaningful growth in users, shielded activity, liquidity and developer adoption.
Why privacy could become a larger crypto narrative
As more personal and financial activity moves online, transaction data is becoming increasingly valuable.
Public blockchains provide transparency, but that transparency can reveal wallet balances, payment relationships and trading behaviour. This may be acceptable for some transactions, but less desirable for companies, institutions and individuals managing sensitive financial information.
The investment thesis is therefore not simply that “privacy coins will rise.”
The deeper question is whether confidential blockchain settlement will become essential infrastructure for the next generation of digital finance.
If that demand grows, projects such as ZEC and $XMR could receive renewed attention. Privacy-related infrastructure on networks such as $ETH and $NEAR may also benefit, although these projects offer different technologies and risk profiles.
One important warning for ZEC holders
NU7 is expected to retire the older transaction format required to spend funds from Zcash’s legacy Sprout shielded pool.
ZEC remaining in this pool could become inaccessible once the upgrade activates. Anyone who has held ZEC in an older self-custody wallet should verify which address type and shielded pool they are using.
Do not respond to unsolicited messages offering to “migrate” your coins. Use official wallet instructions and never disclose your seed phrase or private keys.
The risks investors should not ignore
The opportunity comes with substantial risks:
⚠️ Privacy coins face greater regulatory and exchange-listing uncertainty.
⚠️ Optional privacy only creates value if people actually use shielded transactions.
⚠️ Upgrade delays or technical problems could weaken the current narrative.
⚠️ ZEC can experience sharp rallies and equally aggressive corrections.
⚠️ A powerful story does not automatically justify any market valuation.
Rather than chasing a sudden price spike, investors should monitor whether development milestones translate into real network usage.
What I will be watching
Before forming a stronger view on $ZEC , I would watch:
1️⃣ The final decision and timing for NU7’s mainnet activation.
2️⃣ Growth in shielded transaction usage.
3️⃣ Exchange support and available liquidity.
4️⃣ Wallet and merchant adoption following the faster block times.
5️⃣ Whether trading volume remains healthy after the initial excitement fades.
The bottom line
Zcash has a timely combination of technology, narrative and an identifiable catalyst.
NU7 could improve the network’s practical usefulness, while growing concerns about surveillance may strengthen the long-term case for confidential digital payments.
However, the opportunity should be evaluated through adoption and execution—not price momentum alone.
What would you choose for the future of digital money: $ZEC ’s optional privacy, $XMR ’s privacy by default, or $BTC’s radical transparency?
Share your view below and follow Crypto & Capital for more opportunity-focused market analysis.
Educational content only. This is not financial advice.
#Zcash #ZEC #PrivacyCoins #Monero