```python
# Import necessary libraries
import requests
import json

# Define function to get AI Crypto markets analytics using OpenAI API
def get_crypto_market_analytics():
    # OpenAI API endpoint
    url = "https://api.openai.com/v1/engines/davinci/completions"

    # API key for OpenAI
    api_key = "YOUR_OPENAI_API_KEY"

    # Prompt for user input
    prompt = "Generate AI Crypto markets analytics for Bitcoin, Ethereum, and other top cryptocurrencies."

    # Data to be sent in the request
    data = {
        "model": "davinci",
        "prompt": prompt,
        "max_tokens": 150
    }

    # Headers for the request
    headers = {
        "Content-Type": "application/json",
        "Authorization": f"Bearer {api_key}"
    }

    # Send POST request to OpenAI API
    response = requests.post(url, headers=headers, data=json.dumps(data))

    # Get the response data
    response_data = response.json()

    # Extract the generated text from the response
    generated_text = response_data["choices"][0]["text"]

    return generated_text

# Call the function to get AI Crypto markets analytics
crypto_analytics = get_crypto_market_analytics()

# Print the generated AI Crypto markets analytics
print(crypto_analytics)