In my opinion, if the income from crypto is large enough and stable per month, the government may impose taxes on our crypto income, meaning that the tax is based on fiat currency resulting from the withdrawal of exchangers.
I don't think there should be any taxes to crypto profits.
However, most goods you buy in the store already has taxes in the price, so if we'll be able to buy with crypto that means we pay taxes already
You don't think so, but taxes are already implemented in many countries.
Crypto is considered as an investment and you are taxed based on the profits you earn.
The taxation occurs when you try to withdraw your money and send them to a bank account. If you don't want to be taxed you should better keep them in a stablecoin and in crypto space in general.