Been good for me, I bought $50 worth in 2013 when it was around AUD $500, just because it was a geeky thing to do. A lot of people who bought early on lost the lot because they lost/forgot about their crypto wallet/authenticator and/or the password after a few computer upgrades. I almost lost it, as my 2013 phone held the authenticator and at that at the time the 2FA authenticator was not transferable.
I also had a couple of USB mining sticks which mined up a tiny amount of .002 BTC while computer wasn't running in 2013. At the time it worked out at around $1 return for a lot of running around so I stopped. That has grown to $135 over the years.
It took quite a bit of forensic work to recover everything a couple of years ago.
If it ever tanks, I've lost 50 bucks. I've never traded and would be reluctant these days to invest any more.
There's billions of dollars sitting out there lost & unclaimed on old hard drives/USBs. If you've forgotten your old crypto wallet password/phrase you're pretty well screwed. And if your old Bitcoin is sitting in your crypto wallet on an old hard drive in landfill, you're never getting it back.
And a bit of trivia: The first Bitcoin transaction was for two pizzas for 10,000 bit coins. At today's prices each pizza would be worth $337,555,000 USD