Earlier quoted context omitted.
Technically speaking, it's also a terrible investment vehicle for those same reasons. It's a fantastic parlor game of speculation though, where the point is the volatility.
It's volatile, but the overwhelming trend has been upwards. Historically it's a great investment if you can weather volatility
I'm not saying its bad, but its an extremely high risk investment so not suitable for the money you can't afford to lose. I've heard of many people withdrawing superannuation to put into crypto (or using credit) for example.