You found a hidden ecash cache playing Wusang: Isle of Blaq - a 1-in-1000 chance discovery. There are real bitcoin ₿ sats ツ in this cache. But, you need to claim them before someone else does! The ecash token (the code to claim the sats) has been broadcast onto the Hive blockchain as a comment reply. However, this means anyone can see it and anyone can claim your sats.
Think of it this way: you found a pirate's treasure chest but need to return to the ship to get a rowboat to load the treasure into. While you're delayed, someone else might happen along, see your treasure, and scoop it up.
Any cashu ecash wallet can claim the sats. Just copy the cashu token, paste it into the wallet, and redeem.
Perhaps the easiest way to get your sats is with the browser-based wallet cashu.me.
Once you get your sats, they're safe. No one can swipe them anymore (a cashu token is for one-time use). You can now send your sats anywhere as ecash (for free) or over the Lightning Network (with a small fee).
You can leave the sats on your device, but understand, the cashu.me wallet is only on that device you're using. Consider the sats as there. This is one reason that it's important to write down the backup seed phrase to avoid losing them.