The greatest losses are usually in those altcoins, which seem to be something special, different from hundreds of similar ones.
The thought comes that this is a real revolution in the blockchain and the drop in their exchange rate is temporary and is just an excuse to buy them again and again.
I think everyone can remember such a story, just everyone has their own anti-hero.
I thus lost a lot of money by investing at the end of 2017 in the SMART coin, which has fallen in price over this time almost a hundred times. (