I believe both fiat and btc are equally important in my life but if you want to save in large quantities I am more confident in btc because btc is a very important asset for the future if I only save fiat in the bank then the amount of fiat I save does not increase and I can not make it as an asset for the future.
I still need a bank for my various needs so I also choose both...
long-term savings in the bank is just a waste of time because the money we save, the value will be the same as when depositing it. but if you save in Bitcoin then the possibility of a profit of 5x-7x from the initial savings is very large.