No matter how many bitcoin you hold you can still misuse the money, so we should understand the concept of Richness and Wealth.
The amount of Bitcoin you save won't change but the value of those Bitcoin does. By holding Bitcoin especially in next few years, the value would increase like in past several years thus people always have been saying that holding Bitcoin is beneficial because you can get profit from there (hence holding and invest on Bitcoin is interchangeable).
Unlike fiat the value of that fiat is decreased because of inflation, so your post doesn't make any sense here.
You are actually right on this bro, holding Bitcoin is way more beneficial than holding fiat in the name of savings, because if you decide to save fiat maybe in the bank for like 5 years, after that 5 years, you will observe that the figure will still be the same, but it doesn't have the same value as when you started saving it, because inflation is an enemy to any money being saved up.
That's why to me the best way to preserve your money, it's best you hold it in anything that appreciate in value overtime, and Bitcoin is one of those asset that appreciate in value overtime, so it's the best way to hold your money, and it also create wealth for you in the future if you have stark enough holding in your possession.