What are Quantum Computing related ETFs to invest?

The deep research logic is organized as follows: 

Okay, let's tackle the user's question about Quantum Computing related ETFs. First, I need to check the provided references to find any ETFs mentioned. 

Looking through the references, I see several mentions of ETFs. Reference 3 talks about WisdomTree and Allfunds launching quantum computing ETFs, with VanEck's QNTM already having $92.3m AUM. Reference 4 details the Defiance Quantum ETF (QTUM) with $1.56b in assets. Reference 12 lists QTUM's holdings, including companies like Rigetti Computing and IonQ. 

I should also consider the recent developments in the quantum computing sector from References 2, 7, and 17, which mention companies like Quantinuum, Rigetti, and IonQ making significant strides. These could impact the ETFs' performance. 

The user is asking for ETFs to invest in, so I need to highlight the available options, their strategies, and any risks. QTUM is a passive ETF tracking the BlueStar index, while VanEck's QNTM is another option. WisdomTree and Allfunds are launching new ones, but they might not be available yet. 

I should structure the answer with a conclusion first, then detailed analysis, including a table of ETFs with key details. Also, mention the risks involved, like high volatility and early-stage technology. Make sure to cite the references properly and include the visualization for the ETFs query if applicable. 

Wait, the user's question is about ETFs, and Reference 1 shows "ETFs with Quantum Computing Theme" with 0 results. That's confusing. But other references mention specific ETFs. Maybe the user is looking for existing ETFs, so I should focus on QTUM and QNTM, noting that others are in the pipeline. 

Also, check the user's profile for any preferences, but it's empty here. So, proceed with the available data. Ensure the answer is comprehensive, uses tables, and includes the necessary citations. Make sure to mention the risks and the fact that the sector is still emerging. 

Finally, wrap it up with a conclusion that advises caution and highlights the potential upside for long-term investors. Use emojis to make it engaging as per the format requirements.

### 🌟 **Conclusion** 🌟
**Quantum Computing ETFs** are emerging as a strategic way to gain exposure to this transformative technology. The **Defiance Quantum ETF (QTUM)** and **VanEck Quantum Computing UCITS ETF (QNTM)** are the most established options, offering diversified access to companies at the forefront of quantum innovation. However, **high volatility** and **early-stage risks** remain critical considerations for investors.

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### 📊 **Analysis of Quantum Computing ETFs** 📊

#### 🎯 **Key ETFs Available**
| ETF Name | Strategy | AUM (as of 2025-08) | Expense Ratio | Focus |
|--------------------------|-----------------------------------|-----------------------|---------------|-----------------------------------------------------------------------|
| **Defiance Quantum ETF (QTUM)** | Passive, tracks BlueStar Index | $1.56B | 0.40% | Companies in quantum computing and machine learning (e.g., Rigetti, IonQ) |
| **VanEck Quantum Computing UCITS ETF (QNTM)** | Thematic, actively managed | $92.3M | N/A | Pure-play quantum computing firms (e.g., D-Wave, IonQ) |
| **WisdomTree Quantum Computing UCITS ETF** | Thematic, pending approval | N/A | N/A | Quantum computing and machine learning |
| **Allfunds Quantum Computing UCITS ETF** | Thematic, pending approval | N/A | N/A | Quantum computing and machine learning |

#### 📉 **Risks to Consider**
1. **Early-Stage Technology**: Quantum computing is still in the **exploration phase**, with no commercial viability yet .
2. **High Volatility**: ETFs like QTUM have shown **54.91% annualized returns** but also significant price swings .
3. **Concentration Risk**: QTUM allocates **~15% of assets** to pure-play quantum firms, with the rest in broader tech .

#### 🚀 **Why Invest?**
- **Long-Term Potential**: Quantum computing could revolutionize industries like AI, cryptography, and drug discovery .
- **Diversification**: ETFs like QTUM offer exposure to **79 companies** across quantum hardware, software, and applications .

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### 📊 **Top Holdings in QTUM**
| Company | Market Cap (M) | Allocation (%) | Key Role in Quantum Computing |
|--------------------------|-----------------|----------------|--------------------------------|
| **Rigetti Computing (RGTI)** | 1,100 | 1.58% | Quantum processing units (QPU) |
| **IonQ (IONQ)** | 1,000 | 1.39% | Trapped-ion quantum systems |
| **Nvidia (NVDA)** | 1,000+ | 1.50% | Quantum software development |
| **Hewlett Packard (HPE)** | 1,000+ | 1.49% | Quantum-classical hybrid systems |
| **Synopsys (SNPS)** | 1,000+ | 1.84% | Quantum circuit design tools |

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### 📊 **Performance Comparison**
| Metric | QTUM (2025-08) | VanEck QNTM (2025-08) |
|--------------------------|-----------------|-------------------------|
| 1-Year Return | 54.91% | N/A |
| 3-Year Return | 29.81% | N/A |
| Volatility (5-Day) | 2.34% | N/A |

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### 🚨 **Final Thoughts** 🚨
Quantum computing ETFs like **QTUM** and **QNTM** are **high-risk, high-reward** plays for long-term investors. While the sector is still **nascent**, recent advancements (e.g., IonQ’s 1,000+ patents ) suggest **breakthroughs** could accelerate. For now, **diversification** and **patience** are key.