All my savings are currently in BTC and all I can safe in future will go into BTC as well.
As much as I agree with your sentiments regarding the flaws of the fiat banking system, keeping
all your funds in BTC or other crypto is a bad idea. You say you don't care if the price goes to 1 cent. If
all your money is in BTC, I'd bet you would care quite a lot if you lost >99.999% of your net worth. Regardless of how "real" your 1 cent is, that's not going to pay your rent or buy your food.
I agree with you because of the volatile nature of Crypto Currencies it's kinda high-risk to store a huge amount of money in crypto's but it will be a different matter if it is stored in a stable coin like Tether/USDT because it is backed by real US dollars. Storing money and Investing money in Crypto Currencies are different because storing money is keeping its value to what it is when you stored it an Investing your money on Crypto Currencies will depend the value on the volatile movement of that particular crypto that you invested, you could gain with it or you could lose with it.
it`s enough if I will be able to operate with it for every single purchase and for all of my needs.
Again, as much as I would like this to be the case, it simply isn't at the moment and won't be any time soon. As much as I would like to only use crypto, we have to use fiat for bills, food, gas, etc. Keeping a healthy exposure to crypto and various fiat investments is necessary for a secure future.
Definitely, Fiat is the main pair of Crypto Currencies such as Bitcoin and without fiat, I don't think how will Bitcoin or other crypto's have a value at all. A volatile currency should be paired with a stable currency to make a healthy market and lure traders from this kind of industry.