The crypto Fusion (FSN) is used in several ways within the Fusion ecosystem:

1. Staking: FSN can be staked to extract interest while helping to secure the network. Time-sliced FSN is used to buy tickets for a node, which has a chance to win a lottery to sign the next block. The more tickets you have, the higher the chance of winning.

2. Providing Liquidity: FSN can be used to provide liquidity on the Fusion version of AnySwap or other swap DEXs. This involves creating liquidity pairs with aFSN, which earns fees and rewards in the form of ANY when someone swaps.

3. Gas: FSN is used as gas to perform transactions on the Fusion blockchain. This is similar to how Ethereum uses ETH for gas.

4. Smart Contracts: FSN is required to execute smart contracts on the Fusion platform, similar to how ETH is used on Ethereum.

5. Time-Slicing: FSN can be time-sliced and given to others, allowing them to use it to extract interest and gain a little FSN over time. This can be used for donations or payments without actually losing any FSN.

These uses highlight the versatility of the FSN token within the Fusion ecosystem, facilitating various financial and transactional activities.

To store Fusion (FSN) tokens, you have several wallet options available:

1. MyFusionWallet: This is the original wallet designed specifically for Fusion. It supports all native Fusion functions, including Time-locks, Quantum Swaps, USAN creation, and Fusion asset creation and display. It can also be accessed through Ledger and has basic access choices like whallet.net, but lacks support for Trezors.

2. Elastos Essentials: This wallet supports Fusion and Chainge-based FRC759 assets, as well as FRC20/FRC758 formats. It is highly secure with a specific identity DID system and can connect with Wallet Connect, making it useful as a web3 portal.

3. MetaMask: Although not a native Fusion wallet, MetaMask can be customized to work on the Fusion blockchain. It is particularly useful for handling FRC20 tokens and can connect with AnySwap both in a browser and on mobile phones.

4. ERC-20 Compatible Wallets: Since FSN is an ERC-20 token, it can be stored in any ERC-20 compatible wallet. Hardware wallets like Ledger Nano or Trezor are recommended for added security.

5. Other Wallets: There are additional wallets like TokenPocket and Mathwallet that can be customized to support Fusion and other networks.

6. Klever Wallet: This is a specialized digital wallet designed to store, transfer, and manage FSN tokens, offering a safe and user-friendly experience.

7. Adding Fusion to Metamask: You can also add the Fusion mainnet to your MetaMask wallet, allowing you to manage your FSN tokens within the MetaMask ecosystem.

Before choosing a wallet, consider factors such as security, functionality, and compatibility with your specific needs.

To buy Fusion (FSN) tokens, follow these steps:

1. Choose an Exchange: Select a reputable cryptocurrency exchange that supports Fusion trading and operates in your country. Research and compare exchanges like Coinbase, Binance, and others to find the most suitable one for you.

2. Create an Account: Sign up for an account on the chosen exchange by providing necessary information, including your email address and a secure password. Complete any required identity verification steps.

3. Fund Your Account: Deposit funds into your exchange account using a convenient method such as a credit or debit card, bank transfer, or peer-to-peer trading.

4. Buy Fusion (FSN): Navigate to the exchange's Buy & Sell section and select Fusion (FSN) as the cryptocurrency you want to purchase. You can choose from various order types, including market, stop, limit, and TWAP orders.

5. Transfer to Your Wallet: Once you've purchased FSN, you can either hold it in your exchange account or transfer it to your personal cryptocurrency wallet for additional security and flexibility.

Remember to research the exchange's reputation, read user reviews, and compare different exchanges to ensure a smooth and secure transaction.