When bitcoin first came onto the scene I personally knew a guy who was running a website to act as an exchange. It was small because bitcoin itself at that time was very small.
Then bitcoin had its very first dip and it became unprofitable to mine bitcoins. When that happened he shuttered the website and kept everyone's bitcoins.
I knew of bitcoin early on due to this guy, but even then I had no interest and considered it bullshit. Then when I saw what this guy did it just solidified my opinion that it can't be trusted.
That's not to say that in theory there aren't uses for it, but it's 100% speculative and nothing else. People try to compare it to things like gold for protecting your money from inflation, but that's completely nonsensical.
If the value of gold crashes it still has an inherent value because it's a useful physical good (looking pretty is not the only application of gold). a bitcoin has ZERO inherent value. It's not possible for the value of gold to go to zero, but it's absolutely possible for the value of a bitcoin to go to zero.
crypto will never go away, but it absolutely should.