It is cash like in that if you typo the destination address you instantly lose all the money, which is sort of like how you can accidentally set cash on fire.
Who types destination addresses by hand? Probably the same people that expose a hoard of paper money to flames?
If you've ever said anything like "Donations accepted at $ADDRESS", then everyone can see if anyone ever sent anything, and from there it doesn't take much work to see if you ever spent that money on anything and what else you do with it.
You can obscure things some, but the records are permanent and anything people can figure out stays known. If the authorities are after you, then they can get information from exchanges, which at this point require giving them personal information.
Cash is much more private. It takes much more effort to figure out who you gave your cash to.
Which is stupid, because Bitcoin is THE number 1 crypto, but for some reason they're all claiming it isn't.
In all seriousness, it's not just a talking point. Bitcoin's invention, promises, implementation, and operation has significant fundamental differences from all the others. If all you can be bothered to do is say, "yep, they all look the same to me," then maybe just sit out this conversation?
Cryptocurrency folks do sometimes take the open source Bitcoin code and make small (or large) changes to it in order to do their work. When they do this they create a separate codebase, separate network, and a separate currency. Almost inevitably they do so in such a way as to greatly benefit themselves and to fool you.
I don't see any significant difference between Bitcoin and the rest. Bitcoin was just the first thing that stuck but that doesn't grant it any special privileges.
