Both of you made good points. Instead of letting your money be stuck in the bank with significantly low-interest rates that do not compare to the continuously increasing inflation, it will be better to invest in assets and Bitcoin. Between the two, it will be up to personal preferences and knowledge in which an individual will choose to invest. Personally, I do both, but it is nice to know there are options for our money to grow amidst inflation.
But again, be sure that you'll know the risk because it doesn't mean that you'll invest it in something where you have a 100% chance of getting it back. That is why others tend to hold their money in banks, but with a rich mindset, this is what they are doing: investing in something where you have a chance to gain more profit or earn more money. For myself, I both hold money in the bank and invest in assets, mostly digital assets like Bitcoin. I know this can't prevent inflation, but it can give me more income to fight inflation.
Storing money in the banks might also be called as investing because they pay you some incentives but it's only smaller than those who are dedicated for this purpose. We also know that a smaller return means a smaller risk. That is the only good thing that banks can offer to us. I like what you are doing there.
It can also be classified as diversification. Bitcoin is said to be a hedge against inflation, so we can really prevent inflation this way. It's only ironic if we sell our Bitcoins for cash and we HODL the cash for a while as that can still be affected by the inflation. I think it's better if we can just retain our money in Bitcoins. We can still use it for direct purchasing since Bitcoin is still a currency.
The fact that we deposit money in the bank is also profitable but not significant and if inflation is taken into account, our currency depreciates heavily. In my opinion, depositing money in the bank is only considered a savings for short-term emergencies. Never view it as an investment or a store of value for the long term. So I wouldn't consider depositing money in the bank as diversification because our asset value is decreasing day by day.
In theory, bitcoin is a decentralized currency, but so far, not too many stores or countries allow payments with bitcoin. So it would be inconvenient if we kept all our money in bitcoin. No matter what we say, fiat is the main currency, still the primary payment method, and still necessary in our lives.