Begin by installing and configuring Apache Kafka on your local machine or server. Ensure that the Kafka broker and ZooKeeper service are running. You can do this by downloading Kafka from the official Apache Kafka website and following the installation instructions specific to your operating system.

Use the Kafka command-line tools to create a new topic that will store the CoinGecko data. Open a terminal and navigate to the Kafka installation directory, then use the following command:
```
bin/kafka-topics.sh --create --topic coingecko-coins --bootstrap-server localhost:9092 --partitions 1 --replication-factor 1
```
This creates a topic named `coingecko-coins`.

Write a Python script that makes HTTP GET requests to fetch data from the CoinGecko API. You can use the `requests` library to perform these requests. For example:
```python
import requests

response = requests.get('https://api.coingecko.com/api/v3/coins/markets', params={'vs_currency': 'usd'})
if response.status_code == 200:
coin_data = response.json()
else:
raise Exception('Failed to fetch data from CoinGecko')
```

Install the `kafka-python` library to allow your Python script to produce messages to Kafka. You can install it using pip:
```
pip install kafka-python
```

Extend your Python script to include a Kafka producer that sends the CoinGecko data to your Kafka topic. Here’s a simple example:
```python
from kafka import KafkaProducer
import json

producer = KafkaProducer(bootstrap_servers='localhost:9092',
value_serializer=lambda v: json.dumps(v).encode('utf-8'))

for coin in coin_data:
producer.send('coingecko-coins', coin)
producer.flush()
```

Use Kafka command-line tools to consume and verify data in your Kafka topic. Open another terminal and use the following command:
```
bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic coingecko-coins --from-beginning
```
You should see the CoinGecko data printed in the terminal, indicating the data is successfully stored in Kafka.

To continuously ingest data from CoinGecko into Kafka, set up a cron job (or equivalent scheduled task) that runs your Python script at regular intervals, such as every hour or every day, depending on your needs. This ensures that your Kafka topic is regularly updated with the latest data from CoinGecko.