The point we should make is even if we weren't damaging our planet the scarcity of coal is reason enough to start early at looking into alternatives so we don't end up with no viable options.

This and the problem is all ICOs are made such that your investment is actually a donation so they have no obligation to their funders.

The idea of paper money being banned is ludicrous, I mean maybe in the distant future sure but I haven't seen any proposals whatsoever for how a digital currency could ever work in an offline setting. Paper money works whether an internet or phone connection is available and even when there is no electricity. If we had a bitcoin based digital currency what will happen when the internet goes down, will transactions be unavailable until it is working again?

Think about disaster hit areas, without paper money transactions would be impossible in all but an old fashioned barter setting.