Trading platforms provide the tools to prevent it going spectacularly wrong. Decide how much % loss you're willing to incur and set your stop-losses accordingly. Risk management.
The comparison to gambling is also a bit sensationalist.
I don't know what the roulette wheel will land on or what cards I'll get dealt.
With crypto I at least have the benefit of:
● Information regarding a project - website, whitepaper, community percetptions etc.
● A wide range of opinions on the project
● Charts that allow a more informed decision to be made
I can understand people having a disagreement about the fundamental value of the underlying asset (cryptocurrencies), but the way in which these assets are traded and exchanged is a far cry from the randomness of gambling.