The mindset of "I'd rather be in debt than sell a single satoshi" reflects an extremely strong belief in Bitcoin’s future value. This mindset can be described using several terms:

1. Conviction holding:

This is a concept in the investment community that refers to holding onto an asset with firm belief, regardless of market volatility or personal circumstances.

2. Diamond hands:

A popular phrase in the crypto community describing someone who never sells their assets, no matter the financial pressure, price swings, or market risks.

3. Low time preference:

An economic term frequently used by Bitcoiners to describe the tendency to sacrifice short-term comfort for long-term value. Choosing to go into debt in order to hold onto your satoshis shows that you prioritize future value over present convenience.

4. Maximalist mindset or Bitcoin Maximalism:

If your conviction goes beyond personal finance and becomes a life philosophy, you might be seen as a Bitcoin Maximalist — someone who believes BTC is the most valuable asset and that everything should be denominated in Bitcoin.

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Depending on the context, you can choose whichever term fits best. But if you're speaking within the Bitcoin community, simply saying:

"I’ve got diamond hands — I’d rather be in debt than sell a single sat"

is more than enough for people to understand what kind of Bitcoiner you are.