A more economical solution that keeps all of Bitcoin's benefits would be nice, but it is not clear at all, whether that is possible.
By forbidding Bitcoin large countries might make a dent in its adoption curve and push the problem back a couple of years, but that won't be a long term solution.
Sooner or later we will probably have a globally accepted uninflatable reserve currency that uses a lot of energy, until another genius finds a more economical way to keep our savings safe.
Some bitcoiners would also argue that saving will lead to more informed and contemplated spending, thus reducing waste. Some are already saving a lot because they are expecting benefits in the future, a feeling which might have gotten lost in the recent past.
By forbidding Bitcoin large countries might make a dent in its adoption curve and push the problem back a couple of years, but that won't be a long term solution.
Sooner or later we will probably have a globally accepted uninflatable reserve currency that uses a lot of energy, until another genius finds a more economical way to keep our savings safe.