[Ajedi32]

2 is also true of gold and any other commodity.

3 I'd quibble with you about "overwhelming majority", but yes that's a common use of gold. It's a fairly common use of cryptocurrency too though, especially in countries with high inflation.

4 Maybe in that specific situation yes. Sounds like you agree that's not all cryptocurrencies though. It's also kinda weird that something could go from not being a security to being one (and back) depending on how people happen using it at any given moment in time. E.g. If someone somehow managed to orchestrate a pump and dump scheme with silver, would it temporarily become a security for that brief moment in time and then go back to being a commodity afterwards?