You can’t.
We’ve set the limit at 100, which means you can fetch 100 coins at once max.
You can retrieve 100 coins each time by using the offset parameter to move up 100 spots each time.
Example
This will get you the first 100 coins: https://api.coinranking.com/v2/coins?limit=100
This is how you pick up the coins in spots 101 - 200: https://api.coinranking.com/v2/coins?limit=100&offset=100
The next endpoint for spot 201 - 300 would then be like this: https://api.coinranking.com/v2/coins?limit=100&offset=200