Most people on Nostr are pro Bitcoin, not pro cryptocurrency. Bitcoin and crypto are not the same. There have been tons of scams in crypto, but not in Bitcoin. Sure there were people who created a scam and told people to send them their Bitcoin (Blockfi, Celsius, Netflix doc "Bitconned"), but that isn't the same as the crypto scams. The Bitcoin core devs never created a token and then ran a pump and dump. It's like saying someone scammed someone with USD, therefore USD is a scam.
bitcoin is a cryptocurrency. this idea that bitcoin isn't crypto is relatively new and only bitcoin maximalists actually believe it. the industry certainly has moral people who behave themselves and they're not all bitcoin maximalists. it doesn't actually do any good to try to set bitcoin apart in an attempt to appeal to public sentiment. it just makes the whole thing reek of sectarian quarreling.