Some people like you might say Bitcoin is the dumbest thing ever invented because they don’t get it or see its value. But others see it as a revolutionary technology that changes how we think about money and finance. It's decentralized, which means no one controls it, and it can be sent anywhere in the world quickly and cheaply. It’s had a huge impact on tech and finance, even if it's not perfect. So, calling it the dumbest thing ever might be a bit harsh, but opinions definitely vary.
He is nothing but a troll and a person who hates Bitcoin maybe because he made some investment in it in the past and lost money in it by panic selling which is what most newbie investors do and then they start abusing Bitcoin and saying it's a useless thing just like OP.
Those who say such things about Bitcoin are the ones who don't have much or any knowledge about it and they don't know how they can utilize it positively, and to be honest, their opinions shouldn't affect us or anyone as long as those reading or listening to them are getting at least some benefit from Bitcoin.
If I'm using Bitcoin for something beneficial for me, whether its the price or any other use case, I wouldn't care what others are saying about it.