> If I need to spend 2$ at taco bell, I'll just use my bitcoin.

The currency you're using is USD, since that's how Taco Bell set their prices and it's how you're measuring the value of your bitcoins (via the exchange rate).

I've yet to see any business set their prices in bitcoin. Everyone accepting bitcoin payment is setting their prices in fiat currency (e.g. $2), and accepting an equivalent amount of bitcoin (based on market rates); i.e. treating bitcoin as a payment gateway rather than a currency.

And kicked yourself for that $180 Taco Bell when it peaked at $18,000, right?

Just as much as you kicked yourself for spending $2 on Taco Bell instead of buying Bitcoin at the exact same time.

It's the same thing.

No, I do DCA.

https://www.investopedia.com/terms/d/dollarcostaveraging.asp

To buy Bitcoin, sure. When it hit $18,000 you would still look back at the $2 (then) worth that you spent at $200 / bitcoin and regret it.

> When it hit $18,000 you would still look back at the $2 (then) worth that you spent at $200 / bitcoin and regret it.

This a completely emotional argument, there's no logic behind it, you could also regret spending $2 at Taco Bell instead of on Bitcoin.