the analogy/explanation doesn't really work. A painting, any painting, has value in the supplies used- paint, canvas, frame, etc. I can hand a painting to you. you can touch a painting.
I can't hand you a bitcoin.
bitcoin is simply an experiment in peer-to-peer currency for simplifying transactions. if a group of people can agree amongst themselves that bitcoin is a trusted medium of exchange, then a value for bitcoing is determined amongst them and business transaction happen. no big deal.
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