You are 100% correct. In the US, in theory, (at least) it's "guaranteed" in the Constitution thatrandom000 said:
And crypto is around for 10+ years. Retroactively trying to tax something which was not even regulated properly at that time is theft imo.
Click to expand...
"No Bill of Attainder or ex post facto Law shall be passed."
Source: https://constitution.congress.gov/browse/article-1/section-9/