Let me correct you on something else you said, because cryptocurrency does not provide monthly interest for your savings in the crypto space. because it depends on our knowledge of what level of profit we can get here.

Yes, it's true that we also need to have enough knowledge here because I also agree with the volatility that cryptocurrencies have and believe that they have the potential to provide good profits in the future.

Very true and to add to your point, you don't invest in fiat, you save in fiat, that's the right concept. You can choose to either save your money in the form a fiat in the bank and get very small returns quarterly or annually or you can choose to invest actually invest your money in Bitcoin, I said Bitcoin because it has proven to so far be the safest cryptocurrency with the best framework to invest in.
But whichever you choose is strictly your decision but while you make that decision I'll leave you with two points to note. Choosing to save your money in fiat may look like the safest way to save your money but that's what the bank wants you to believe while in reality you're simply enriching the bank and risking your money, why do I say so? We all know that inflation is hitting globally in an unimaginable way, thereby affecting fiat in ways you can never imagine. Save $100 in your local bank today and come back to check on your money after 1 year, it's still the same $100 but inflation would make that same $100 depreciate in value, less valuable than it was 1 year ago, so how is that a safe investment? Never fall for that bank trick.

But if you choose to invest in Bitcoin today, check back after 1 year and you'll see what a wise choice you've made. Sure there may be periods where Bitcoin would experience crazy ass dips and if you're not sure of yourself you may take out your money and that's when you loose, but if you overlook the pressure of dip and leave your money there, then you'll reap the reward of your patience and for making the right choice. One rule of Bitcoin is, you loose when you take out your money, but if you don't take out your money, you'll always gain. So consider this points before choosing where to put in your money.

I will choose to invest in crypto (in Bitcoin specifically). However, gaining interest monthly is not that accurate in crypto since it depends on the status of the market and the coins that you're holding. But the potential to gain huge is always there especially if the coin that you buy is Bitcoin. It's true that an investors needs to understand what they are getting into before engaging themselves since Bitcoin is unpredictable and also associated with risk.

On the other side, I can't consider saving money in banks as an investment due to low interest. When it comes to fiat, I'd rather invest in gold than in banks.

Banks have the most regulated investments I can ever imagine, it will not be out of place to still rely on them to invest but to look at crypto, be prepared for whatever comes as the volatility of the market is unimaginable. Only people open to such are degree of volatility should adventure into crypto investments

Monthly crypto earnings not just come from holding onto your assets. There are agreements, much like how yield farming works on certain exchanges or well known wallet companies. Holding with the sole aim of profiting from the asset's price increase depends on market volatility. You'll profit when the market is on an upswing (bullish), but during a bear market, it won't yield any returns, and your assets may decrease in value.

Crypto investment is very dangerous for people who are weak at hodling. Occasionally FUD occurs and emotions are influenced which will have a negative impact on crypto asset holders. Therefore, regardless of whether it is good or bad to hold crypto assets rather than fiat in a bank, the answer is relative, depending on the person doing it and their risk profile.

I invest in BTC with the aim of making a profit and of course investing for the long term and I also always take advantage of Bitcoin's fluctuations and volatility, namely by short-term investing in BTC and the goal is to make a profit and only sell when there is a profit.

I don't invest in fiat because what I know is that fiat is always subject to inflation, but of course I also need everything because I invested in BTC with the aim of getting fiat to reduce inflation and advance the economy by investing in BTC.

However, everything cannot be free from risk, so in this case business strategy must be prioritized.

That is if you know how much when to sell and how much when to buy that is also why others chooses FIAT as they hate volatility but if we are to choose and to decide? yes  Crypto is the best(actually the title better to called BITCOIN ng CRYPTO because we are in bitcoin section)
This is what we can say now after learning about cryptocurrency Bitcoin specifically and now we can compare against banks and yes best and better to save our investments.

I am open-minded when it comes to money , the person who says that he would save his money in a bank I repeat it, but it is something that I do not share his Idea , because the bank is not going to give him the Reliability that the Bticoin gives, the bitcon just save it and forget that you have qbitcoin and if you wait more than 5 years it has a very great value, and of that I am sure because when bitcoin is with fiat, fiat has no life, fiat money is devaluable, the No bitcoin, no more with that condition, I have to do things very well with my bitcoin, it is what I need to be able to be well with everything I have, it is the best version and if Others do not Want to believe it, that is Already a Problem They.

I would choose crypto investment any day any time base on the fact that investment in fiat wouldn't yield as much profit as crypto even with less input unlike fiat, in crypto you buy low when it price is in bearish run by buying bit by bit using DCA thereafter capitalize on it volatility during a bullish run or when  it price pump massively just like what we are experiencing now in the market, for instance last year December the price of Bitcoin was $15700 an investor who bought at that price would have earned a 100% profit now with a simple buy and hodl, an $100K investment would have yielded same amount or more that is one of the main reasons that would always prompt me to invest in crypto whatever amount of fiat in my disposal I would always exchange it to crypto for investment.

Not crypto but bitcoin. I'd rather choose bitcoin over fiat, but if I had to decide between some shitcoin and fiat money, I'd rather take fiat. This reminds me of that funny video on youtube where a guy was asking random people if they would prefer to get $100 or 1 bitcoin and a bitcoin was more than $1k at the time (somewhere in 2017)and they all wanted cash.
If you approached me asking if I want $1k in cash or $1k in XRP or something, I'd take cash and buy bitcoin