Everything is a speculative asset.
Your marriage is a speculative asset that your wife doesn't cheat on you in future and actually loves you.
S&P is a speculative asset that it will perform like it has been performing in last 30 years.
USD is a speculative asset on US not going bankrupt.
Your career is speculative asset that you don't get fired tomorrow and you can find another job if you do get fired.
Bitcoin is a speculative asset that a decentralized cryptocurrency is better than relying on coins issued by bankruptable nations.
You are a speculative asset of your ego.