Bitcoin is,
Fundamentally, code snippets running concurrently on many computers in touch with each other. We have mental models or analogies that partially illustrate subsets of the code, but not its entirety.
Or,
It’s the money
What do all these have in common?
Coal supply exhaustion
Carbon footprint
Cancer research
Climate change
Covid vaccine
Communism
Central bank
Corona virus
Craig Wright
Cold fusion
Coors light
Cardano
Cash (Bitcoincash)
CPI
Good: AMC app lets you buy movie tickets in lightning!
Needs improvement: it's via BitPay which took the money but didn't get the tickets and had to KYC to get a refund.