Do you need Osmo to use Osmosis?

I've been hearing a lot about Osmosis and its capabilities in the crypto space, but I'm still a bit unclear on some fundamentals. Could you clarify for me if I actually need to hold Osmo tokens in order to utilize the Osmosis platform? I've read that it's a decentralized exchange that allows for cross-chain swaps, but does this mean I must have Osmo as a prerequisite for using its services? Understanding this aspect is crucial for me as I explore my options in the crypto world. Your expertise in this area would be greatly appreciated.