Because they should invest in a stable coin without keeping their stable cash. For example, if they want, they can choose the stable coin Bitcoin; if they can invest in it without keeping their stable cash, they can benefit greatly. If your stable money is not used anywhere,
It's really laughable that you are referencing to bitcoin as a stable coin. We shouldn't make use of terminologies we don't know their actual meaning, because it will make you look like an idiot when you use them wrongly especially in an open space as this. So when next you are making use of a word make sure you know the actual meaning first. Bitcoin is not a stable coin, because the prices of bitcoin are never the same. It keeps changing every minutes of the day, weeks, months and years. It moves up and down all the time.
investing in Bitcoin is better than keeping it in the bank or somewhere else. If you want, you can withdraw the invested money at any time; it is your matter,
It is true that investing in bitcoin is better than saving your money in the bank or anywhere as you have rightly stated above, but you are wrong when you said you can withdraw the invested money anytime you want. That statement is alien to the principles and teaching of this thread. You can't withdraw your money invested in bitcoin at anytime, that's why it has always been said here many times that you should invest only money you won't be needing for the next 4 years. If you withdraw your invested money anytime you want, that means you are gambling with your bitcoin and it's more like you have a trading mentality and we don't encourage that here. Your invested money in bitcoin should be allowed to stay up to a full circle, before you can think of withdrawing from it.