What is 0.5 BTC, in this example? What is it made of, on the blockchain.
It isn't made of anything. It is merely a number that says 50,000,000 sats with a public and private key associated with it. The blockchain is just the record-keeping and security base layer needed to ensure that those little entries that say 0.5 BTC, 2 BTC, etc. all possess the properties necessary for them to function as money.
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