I don't think this idea will work long term for civilization especially considering what humans have already built up. Most of the amazing infrastructure and achievements we've had has been facilitated at least in part by the fact that we can exchange a single agreed upon unit of value in exchange for goods or services we need or want. If you needed something in the barter system, you have to not only find someone who has what you need but someone who has what you need **and** needs what you have. This sounds like a nightmare, especially when you needs a lot of different goods or commodities to say make a product or something. Having a universally agreed upon store of value like dollars or bitcoin makes things extremely convenient because it gives you the flexibility of A) storing value for later use, B) when you use it later, it can be exchanged for virtually *any* goods or services. For those reasons I think money is extremely important and is here to stay my friend.

That is very true. There may be the risk of fines or imprisonment to do so, and guess what currency those fines will have to be paid in? However, you are right there will always be black markets.