I know that there are many individuals here in this forum that are always looking on cryptomarket price for the crypto that they are holding. Always hoping that one might get a good market price increase. This is why one does overlook on real number of crypto that they are holding because they are always looking on the equivalent of the crypto to fiat money. It is not like that because the real thing that you should look is the number of crypto that we know it is not changing for example you have 6 BTC @ 6k USD and eventually market price drop to 5K USD per BTC. Even if market price drop you still have 6 BTC and that is not changing and you should not worry. You have to get worry when you have 6 BTC and after seeing some time you will have 3 BTC only. That is one thing that you should worry because there might be one getting into your digital wallet and transfer your BTC to other digital wallet.
Your comment will only look valid if we have loads of options to use our bitcoins in the merchant settlements without converting it into fiat value equivalent. But at the current situation, it is not a valid comment at all. Bitcoin doesn't have an intrinsic value or any purchasing power of its own. Its purchasing value always depends on the local fiat currency of the user.
Let's assume, you have 5 Bitcoins whose current value is (5 X $6,000) = $30k USD. Now you can buy a swanky car whose market price is $30k USD using those 5 bitcoin.
Tomorrow, if the value of one bitcoin falls to $5,000, the purchasing power of your 5 bitcoins will come down to $25k USD and you will not be able to afford that swanky car with your 5 bitcoins. It is true for bitcoins because it doesn't have any intrinsic value and it is always dependent on the local fiat currency price.
Your argument is valid only for government backed currency or a centralized currency system where we have some authority to ensure the value of that currency. In case of bitcoin, we have none!