user106101: There are plenty crypto debit cards, like Crypto.com's or Binance's. I can easily use my fund to purchase goods and services without taking profit out of an exchange, and just simply use the funds on it.
If I purchase coffee with a debit card like that, is it taxable?
And if it is, how do I even know or calculate my taxes?
Is there a specific rule on this in the EU?

user13866: 
Is there a specific rule on this in the EU?

According to https://nomoretax.eu/bitcoin-taxation-developed-countries/

The fiscal treatment of Bitcoin for tax purposes differs depending on EU country.



how do I even know or calculate my taxes?


By consulting material published by the tax authorities in the country in which you are resident (and US as well if a US citizen resident outside the US).
By consulting a tax adviser.
By contacting the local tax authorities and asking them for advice. (In my country at least, they are friendly and helpful to people seeking advice).


106101: <p>There are plenty crypto debit cards, like Crypto.com's or Binance's. I can easily use my fund to purchase goods and services without taking profit out of an exchange, and just simply use the funds on it.</p>
<p>If I purchase coffee with a debit card like that, is it taxable?</p>
<p>And if it is, how do I even know or calculate my taxes?</p>
<p>Is there a specific rule on this in the EU?</p>
 13866: <blockquote>
<p><strong>Is there a specific rule on this in the EU?</strong></p>
</blockquote>
<p>According to <a href="https://nomoretax.eu/bitcoin-taxation-developed-countries/" rel="nofollow noreferrer">https://nomoretax.eu/bitcoin-taxation-developed-countries/</a></p>
<blockquote>
<p>The fiscal treatment of Bitcoin for tax purposes differs depending on EU country.</p>
</blockquote>
<hr />
<blockquote>
<p><strong>how do I even know or calculate my taxes?</strong></p>
</blockquote>
<ul>
<li>By consulting material published by the tax authorities in the country in which you are resident (and US as well if a US citizen resident outside the US).</li>
<li>By consulting a tax adviser.</li>
<li>By contacting the local tax authorities and asking them for advice. (In my country at least, they are friendly and helpful to people seeking advice).</li>
</ul>
