You're confusing currency with commodity...
I don't really understand your issue, it satisfies just about every requirement for currency (not commodity) and generally far more effectively than traditional money - which hasn't been backed by gold for a long time:
Scarcity: Supply decreases of new Bitcoin by 50% every 4 years, there are around 18m in circulation, 19m in 2 years and isn't at the behest of governments or banks so circulation increases leading to devaluation are far less likely. Decentralised means it's free from whim and control.
Divisibility: Bitcoin is divisible up to 8 decimal places, again far superior to traditional currency.
Utility: the beauty of blockchain technology means that there is no need for trust, again completely different and superior to traditional currency which collapses without it.
Transportability: Again shits all over traditional currency, it's virtually instantaneous no matter the size of the transaction.
Durability: Again as it has no physical property it's can't be lost or damaged. Crypto once more is superior (assuming you don't forget the key to your wallet).
Counterfeiting: Guess what Bitcoin wins here too, in theory a 51% attack is possible in practice the chances are vanishgly small.
As Bitcoin continues to gain traction (and fear from governments) it will only become more powerful and ubiquitous. Undoubtedly it still has the speculative risks of a bubble but that is changing. Draw a line through the value of Bitcoin over time, ignore the peaks and troughs and it's only heading in one direction.
Firstly I am not questioning whether Bitcoin will have longevity or if it will come into common usage; I am certain it will
I'm am questioning its value and stability
If what you say above is true, then why the volatility?
If it had all of those attributes that you claim it would be the most stable of assets, but it is not.
And do not confuse Bitcoin with the Platform it sits on; Blockchain has untold potential
Gold has not been directly linked to the Dollar since the 70's but a link remains nonthethless; the value of Gold is predictable when compared to the performance of the Dollar.
The fact that the likes of Morgan Stanley and the rest of the vultures are breaking their necks to promote Bitcoin should be the biggest warning of the lot.
I understand the attraction of Bitcoin particularly amongst the younger generation, and the middle aged who think they are trend setting, but it will end in tears.
By all means educate me on how to value the currency, if you know how, which I doubt.
No one in their right mind would exclude the peaks and troughs when attempting to gauge pricing or momentum; without those peaks and troughs there is no context, it is just a line.
How can tried and tested technical indicators be constantly confounded by one asset alone?
Why do instruments like Bollinger Bands, and MACD and RSI and SAR and Stochastic and Fibonacci Retracement get it right on all asset classes bar one?
There is one golden rule you should be aware of were investments are concerned; the more you pay for something the less inclined you are to think it is a fake.