A government can create the legal basis to tax anything they like; including the gold in your safety deposit box or bitcoins.
Yes, the point is kinda that they shouldn't.
So I guess your point is that investing in land is a poor way to evade taxes, legally or illegally?
Sure, bitcoin does look better in that regard.
Still I wouldnt worry an investment in land would lose 50% or 90% of its value in a short term. Something I cant say of bitcoin or many other investments.
Worse. Land could gain a lot of value in the short term. If you didn't want to sell it, you may suddenly have no choice as land is taxed on assessed value.