Money is just a psychological-technology that vastly improves efficiency of trade.

It's not exactly feasible to return to a barter system, unless you have some other way of solving the "double coincidence of wants" problem?

One of the innovations of Bitcoin is that it serves purely as a monetary good, so there's no other demand for it outside of it serving its role as money. Counter that with gold which has many other applications.

To be fair, fiat achieved this too, but it came with disastrous trade-offs...