Here is the analysis and calculation regarding the cryptocurrency property division for Mira Sol, acting as your counsel.

### 1. Separate and Marital Proportions (Initial Bitcoin Pool)
*   **Facts:** Evan brought 8 BTC premaritally (Separate). He bought 4 BTC using marital funds during marriage (Marital). Total pool: 12 BTC.
*   **Rule Applied:** Rule 1 (Presumptions) and Rule 3 (Commingling Proportionality).
*   **Calculation:** Since the units are now commingled without specific identifiers, the character is proportional to the input sources.
    *   Separate: $8 \div 12 = 2/3$ (66.7%)
    *   Marital: $4 \div 12 = 1/3$ (33.3%)
*   **Conclusion:** The initial wallet is **2/3 Separate / 1/3 Marital**.

### 2. Character of the 3 BTC Sale and Remaining 9 BTC
*   **Facts:** Evan sold 3 BTC from the commingled pool. Proceeds were spent on ordinary household expenses.
*   **Rule Applied:** Rule 3 (Proportional character applies to withdrawals) and Rule 6 (No reimbursement for ordinary expenses).
*   **Calculation:** Because the pool is indistinguishable, the sale reduces the Separate and Marital interests proportionally.
    *   Remaining Pool: 9 BTC.
    *   The ratio remains unchanged (Rule 3).
*   **Conclusion:** The remaining 9 BTC retain the **2/3 Separate / 1/3 Marital** character. Because proceeds were spent on marital expenses, no value is returned to the estate from that sale; it simply reduced both estates proportionally.

### 3. Character of the 6-Bitcoin Exchange into 90 Ether
*   **Facts:** Evan exchanged 6 BTC (from the remaining 9) for 90 ETH.
*   **Rule Applied:** Rule 4 (Character follows asset surrendered).
*   **Calculation:** The 6 BTC used in the exchange carried the pool's character ratio ($2/3$ Separate, $1/3$ Marital).
    *   Separate Character transferred: $6 \text{ units} \times 2/3 = 4 \text{ units equivalent}$.
    *   Marital Character transferred: $6 \text{ units} \times 1/3 = 2 \text{ units equivalent}$.
*   **Conclusion:** The resulting 90 ETH pool inherits the **2/3 Separate / 1/3 Marital** character. The remaining 3 BTC in the original wallet also retain this ratio.

### 4. Separate and Marital Value of Known Holdings (Valuation Date)
*   **Current Holdings:** 3 BTC and 90 ETH.
*   **Rule Applied:** Rule 5 (Appreciation follows proportional ownership) and Rule 8 (Valuation date).

**A. Remaining Bitcoin (3 BTC)**
*   Total Value: $3 \times \$50,000 = \$150,000$.
*   Separate Share ($2/3$): $\$100,000$.
*   Marital Share ($1/3$): **$\$50,000$**.

**B. Known Ether (90 ETH)**
*   Total Value: $90 \times \$3,000 = \$270,000$.
*   Separate Share ($2/3$): $\$180,000$.
*   Marital Share ($1/3$): **$\$90,000$**.

**Total Known Marital Crypto Value:** $\$50,000 \text{ (BTC)} + \$90,000 \text{ (ETH)} =$ **$\$140,000$**.

### 5. Mira’s One-Half Share of Known Marital Crypto
*   **Rule Applied:** Rule 8 (Ordinarily receives one-half).
*   **Calculation:** $\$140,000 \text{ (Total Marital)} \div 2$.
*   **Mira’s Entitlement (Known Assets):** **$\$70,000$**.

### 6. Provisional Classification of the Second 40-Ether Wallet
*   **Facts:** 40 ETH found in undisclosed wallet ($120,000 value). Evan claims gift from brother but produced no evidence. Funds arrived during marriage.
*   **Rule Applied:** Rule 7 (Undisclosed wallet is presumptively marital unless traced to separate source; gifts require evidence of intent and source).
*   **Analysis:** Evan failed the burden of proof for a gift. No donor records or testimony were provided. Under Rule 7, assets found in undisclosed wallets during marriage are presumed marital.
*   **Conclusion:** Provisionally classified as **100% Marital Property** valued at $\$120,000$.

### 7. Mira’s Share and Concealment Surcharge (If Second Wallet is Marital)
*   **Rule Applied:** Rule 8 (Division) and Rule 9 (Concealment surcharge).
*   **Total Marital Value:** $\$140,000 \text{ (Known)} + \$120,000 \text{ (Hidden)} = \$260,000$.
*   **Mira’s Standard Share:** $\$260,000 \div 2 =$ **$\$130,000$**.
*   **Concealment Surcharge:** The court may award 20% of the *concealed marital property's value*.
    *   Calculation: $20\% \times \$120,000 =$ **$\$24,000$**.
*   **Total Award to Mira:** $\$130,000 \text{ (Half Share)} + \$24,000 \text{ (Surcharge)} =$ **$\$154,000$**.

### 8. Exact Exchange, Wallet, and Donor Evidence Still Needed
*   **Rule Applied:** Rule 10 (Counsel must identify missing records before final settlement).
Evan's defense of the second wallet rests entirely on a "gift" claim which lacks documentation. We cannot finalize division without disproving or confirming this source.
*   **Forensic Order Requests:**
    1.  **Blockchain Analysis:** Trace the specific incoming transaction address for the 40 ETH to identify the sender's wallet ID and historical activity.
    2.  **Exchange KYC Records:** If the sender was an exchange account, compel subpoena of Know Your Customer (KYC) data from relevant exchanges to identify the human owner.
    3.  **Donor Testimony & Records:** If Evan claims it was his brother, compel a deposition of the brother and production of *his* crypto wallets/ledgers corresponding to the transfer time.
    4.  **Wallet Access Keys:** Production of private keys or seed phrases for the second wallet to prove ownership history and rule out prior separate acquisition (e.g., premarital holding).

### 9. Recommendation: Settlement vs. Discovery
**Recommendation: Reject the $50,000 offer and seek targeted forensic discovery.**

**Reasoning:**
1.  **Mathematical Deficit:** Even if we ignore the second wallet entirely and accept Evan's claim that the hidden assets are irrelevant, Mira is entitled to $\$70,000$ based on the known marital crypto alone. The offer of $\$50,000$ leaves her $\$20,000$ short on known assets.
2.  **Likely Asset Recovery:** Under Rule 7, without proof of a gift, the second wallet is presumptively marital. This adds $\$60,000$ to her half-share.
3.  **Penalty Opportunity:** If we can prove concealment (which he admitted by omission in sworn disclosure), we can seek an additional $\$24,000$ surcharge (Rule 9).
4.  **Strategic Leverage:** Evan's claim that "wallet-to-wallet transfers are too technical to trace" is legally insufficient under Rule 10. The court requires records, not speculation. By seeking a forensic order, we force the production of evidence that will likely collapse his "gift" defense or reveal further assets.

**Action Plan:**
File a motion for a **Forensic Accounting Order** regarding the blockchain source addresses and donor verification before considering any settlement. We cannot settle on $\$50,000$ when our client is already entitled to a minimum of $\$70,000$ plus potential penalties.