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About usability...... i have a very very special opinion about that, and a lot of people is gonna kill me for what im gonna say, but for me BTC cant be the coin for the day to day transactions. I have a few arguments since his proper tecnology the way was build and the Gresham law.
Sure Gresham's law suggests that you use your bad money before you use your good money, so if you have other money to spend, then you would spend that first. I doubt that precludes bitcoin from being used in transactions. We just spend all of our more shitty money first, and if we have been working our whole life and saving in bitcoin, and maybe we are spending other kinds of money, and so when it comes time that we run out of our other money, then we have to spend our bitcoin. Same thing if we were being paid in bitcoin, then we might save those but then if we are ONLY being paid in bitcoin, then after a while we have no choice but to spend our bitcoin if we want to eat and have shelter.
I think this view of gresham's law and bitcoin is interesting. gresham's law says people spend bad money like weaker currencies and keep good money, like precious metals. but bitcoin might change that. bitcoin is deflationary and has a fixed supply, making it a good store of value. people might use fiat or other money for daily spending, but bitcoin could be saved for the long term or as a hedge against inflation. It makes sense to use bitcoin for savings and spend lesser money, especially considering the risks of fiat currencies. I also think bitcoin will grow as a way to pay for things. as more people use it they will get more comfortable using bitcoin for everyday purchases. eventually, bitcoin might become the good money, with people spending more fiat money. If there’s no choice, people will have to use bitcoin for essentials. This idea seems both realistic and promising for bitcoin's future in the economy.