Uhh, no. It's nothing like heroin. Bitcoin is the first real application of blockchain technology in the form of a decentralized currency. It hasn't quite lived up to the currency part, but it is definitely decentralized. No one can shut bitcoin down no matter how hard they tried short of completely shutting off the internet. Most people here are in cryptocurrency in general because we believe that blockchain technology can better the world. Imagine a voting system that uses blockchain to verify votes. It would be simply incorruptible. No more fraudulent voting claims, because there's no way to hack the network because the network is everywhere in the world. There's no central point to attack. There are many many other real world applications like this.
Now, lets look at heroin. It's a drug, only sold on the black market and other illegal markets, drug dealers, etc. It does nothing for the world and only serves as an escape for those using it. You could maybe argue that it's similar in it's addiction but I still completely disagree. Would you compare heroin users to people who trade stocks? Or people who invest in companies? Of course not. If someone invests more than they have, be it in stocks, startups, or crypto, they should never invest more than they can afford to lose. That's the risk of investments. There's really no similarity other than your imagined gambling comparison, but cryptocurrency is as much as gambling as investing in anything. It's fundamentally different from gambling. I hope you look into bitcoin and crypto in general before you make such ridiculous comparisons in the future, and maybe you might learn something as well.