For tax: in theory, we tax the things we don't want people to do. (Don't get me started on income and corporate tax). Is the thing we don't want people to do "hide from tax in cryptocurrency" or "hide from inflation in cryptocurrency"? For the powers that seek to impose a tax, the answer is probably both, as they benefit from tax directly, and those that craft inflation get to pick the winners while the rest suffer. Additionally, this crowd will also attract those who believe all things should be taxed, as a strong government provides the things they care about most. This crowd will further expand to those who worry about the next rash of cyber attacks wiping out entire families who essentially abandoned their bank in favor of crypto. When you consider that standard cybersecurity practice is "when not if", allowing a proliferation of cryptocurrency might lead to a lack of faith in the internet altogether, which has cascading effects. Chasing out crypto investors with an excessive tax might be the way to save the internet.

Against tax: this crowd starts with those opposed to all taxes, as the government either does not provide the things they care about, or does so inefficiently as to be wasteful. In addition to the simple principle of avoiding tax, this crowd might expand a bit in the middle class, as it seems only the middle class actually pays taxes. The rich have lawyers to find loopholes, and the poor have government to find loopholes. Taxing the middle class keeps the classes separate, as the middle class never attains enough wealth to do too much more than survive. This crowd should expand further to include those disappointed with excessive inflation. Zero inflation benefits the rich, as they can postpone purchases until the price is to their liking, but the poor and middle class don't have enough savings to see a benefit. High inflation only benefits those in power, as they're funneling it to their pet projects in a rush to claim success. Low inflation seems to be the key, as the rich get progressively less return waiting for the perfect investment, but the poor still have purchasing power with a strong currency. Due to mathematical limits in Bitcoin, this inflation is nearly locked at a low rate, one which might be ideal for society.