1. Is cryptocurrency an investment of money? Obviously yes, at least in the sense you have to spend money to purchase or mine it.
2. Is cryptocurrency investment in a common enterprise? No. What enterprise? Common with who? Maybe if it's a token issued by a company or something and tied to their profits somehow, but that doesn't apply to any of the common cryptocurrencies like Bitcoin, Etherium, Monero, etc.
3. Is there an expectation of profits? This depends on entirely on the person buying the token and what they intend to use it for.
4. Does any profit come from the efforts of a promoter or third party? No. What promoter? What third party? If the value fluctuates you can make a profit, but there's no third party involved exerting "effort" that's involved in that process.
If you want to argue with me on 2 and 4, explain how cryptocurrency meets those criteria but not, say, gold.