The only "failing" is that Bitcoin is not a stable long term investment (which wasn't its design goal to begin with).
Consider, from the white paper (with regards to mediated digital transfers): ` The cost of mediation increases transaction costs, limiting the minimum practical transaction size and cutting off the possibility for small casual transactions, and there is a broader cost in the loss of ability to make non-reversible payments for non- reversible services. `
Nobody is doing 'small casual transactions' with Bitcoin, which was evidently one of the goals.
That is not true and can be easily proven looking at the transactions on the blockchain.
However, layer 2 solutions like Lightning are good for small value transactions since fees are low and fast.