I came here to find someone who share the common goal to contribute to bitcoin, as here is where satoshi had left us. I am not sure if this board owner will leave my post intact (my last topic was delete in few hours in another section), so i will leave most of my words in later posts.
I have been know btc for some time, and I love satoshi 's protocol though I think many of us have miss something important. Bitcoin success because it introduce miner into the party between dev. and trader. In human history, it is always trader(I would say bank is also a middle man as trader) who wrote the ledger. if btc is still in its infancy as satoshi said, i would say the solution must focus on miner.
As I remember, the problem about btc a few years ago when it begin to reach its bottleneck of scale problem is that: trader only want to trader fast and easy, dev want the coin to apply to more application, and miners have no clue where they should go. then I was confirmed by myself that it will unlikely to find the correct way to btc2 in the following years.
Actually the miners do very well what they do: confirm transactions and get paid for that. As long as the miners want to get paid and want that their payment is valuable, they can (usually) be trusted. They can be seen as a pretty good 3rd party that doesn't care who is sending the transactions and why.
On the other hand, if the ledger is written by parties involved in the transaction, it can be expected that one of them may try to cheat. Afaik altcoins like Grin may be fixing that, but I didn't pay attention, if you are interested I suggest you research more.
Satoshi had a simple and effective approach; it doesn't mean that's the only possible approach. But also you should not expect this get implemented into Bitcoin.
A common saying is: You have an idea? Make your altcoin based on that and see if the idea works and the coin will have success.
All in all, in the same way you make a new electric car instead of converting your current (petrol based), you cannot really expect Bitcoin do such drastic changes, whether the idea is great or not.
Just my 2 satoshi.