What kind of wallet file did I find?

I found this old file on my hard drive from 2017 called "mystery wallet" with no extension. Back then, I was messing around with cryptocurrencies and mining, but I can't remember what this is. Should I just delete it or could it have something? I opened it after adding a.txt extension and it's just a long string of characters starting with QklFMQJD5E. Any ideas what it might be?

Sounds like it could be an encrypted Electrum wallet. Electrum usually doesn’t have extensions for its wallet files. The string you mentioned gives me a vibe that it’s Electrum-related. Try loading it in Electrum, but make sure you grab it from the official site and check the PGP signatures. If it prompts you for a password, you might be onto something... good luck remembering your old passwords.

Wow, you called it! It was an Electrum wallet. After trying a few passwords, I got in, but sadly the balance was zero BTC lol. Thanks for the help! Quick question, though. I have some old ripple wallets too, probably with $0 as well, but there's this string starting with eyJpdiI6IktqTVJKOG. How do I restore those?

Man, I can't really help with Ripple wallets. I only dabbled in XMR. But hey, at least you got your Bitcoin wallet sorted, right? Ripple was a bad investment back in the day for me too. Just use Trezor or something, if you have it.

File names might be more telling than those first few characters. A lot of wallets are specific to their names or backup formats. If it's an Electrum fork for XRP or other coins, be careful, since a lot of those are scams. Definitely, ask around in the alts section or other Ripple forums where experts might hang out.