10 btc is really very big amount in my country so without thinking much I will sell majority of my coins when it hits the price of $3k as to spend in real world you need fiat money and bitcoin is not yet popular in my country so I will prefer to have fiat money in my hands which can be used anywhere to buy anything or even to invest it in any other investment product and rest I will hold for the future.
You'll change your mind after selling it. I also used to think like that, that Bitcoin is too volatile and it would be better to have fiat, because I can buy anything. And I cashed out and didn't buy anything. I kept holding my fiat on my bank account for a year and nothing has happened, I still had the same amount, while Bitcoin was growing.
I can't even imagine holding fiat for any length of time. I use to hold silver and gold before I heard of Bitcoin, but never fiat.
When I was about 7 years old, a grandparent gave me a $5 savings account. At the time, I could buy a candy bar for $0.05. When I was 14, that savings account had about $6 in it (shitty interest rate even for that time). On the other hand, candy bars cost $0.35 (partly cause we moved). I just remember thinking we should just buy and store stuff. My other grandparent hoarded silver (and everything else) and seeing the light, I turned into a hoarder too.
BTW, hoarder precious metals has a lot of problems. I always worried about it getting stolen or lost and you can't travel with it. Crypto is just so much easier to deal with. You just need to memorize your keys or seed. I could lose absolutely everything and I would still have my crypto.