Does anyone believes to open a savings account in a bank where they will pay him an interest on his savings is a good and secured investment? Say that the bank can pay him an interest rate eg 5% a year on his money, if inflation is around 7%, his investment loses 2% per year. Saving and investing are often used interchangeably, but they are completely different. 

  In my opinion not all eggs in one basket. A good strategy would be: 50% of our capital to savings, 30% -35% in low risk investment and 15% in high-risk investments

  But this not the point. The crucial question is the investor decision about the risk he wish to take and what he considers as a savings and what as investment. Savings in bank notes? Definitely yes if you live in an advanced country with a strong economy. If you live in a small country where the currency is inflationary then gold is a secure investment. Cryptocurrencies like as bitcoin I believe is a good investment but it depends on the price that someone bought it unless he was smart to buy or mine years ago and prudent to hold it and not trade it with paper money. Long-term investments such as market shares of large multinationals and land market. Short-term market as medium and high risk shares. So I would like to ask; What kind of investment is trading between cryptocurrencies?

my money is constantly working. I do not have stocks that are simply stored. I have all their savings are invested in different projects. Except for the amount that I need for operating costs

you're right that's what im doing right now saving all my bitcoin because in the next 2 years i know 1bitcoin will hit 1k usd . but if his ttalking about saving money in actual using fiat system. much better if he invest it on bitcoin so it grows up accross the bitcoins grow too. he also can search about bitcoins graph so he will not hesitate to invest in bitcoin .

I agree and if you want a long term investment. Since bitcoin is rising now, this is very favorable to us. If you buy when bitcoin is $300 dollar the previous months, now your bitcoin almost double. without touching it in your wallet.

There's no worrying if you just hold it for a longer period of time, in that way you are convince that the price will increase and you will benefit. The future is what matters and instead of venturing into other investments just save continuously your money into bitcoin and you shall receive great rewards.

For me, I think it's better to invest it in real estate.

The value of an estate especially a land no matter what happens never depreciates.  Smiley

In my opinion it is always best to invest your money. Saving it only will reduce its value. It may be the same amount, but if you just keep it in a safe or somewhere that it will not grow then it loses value. In the future it will not buy what it can now.

And invest and easy to store - it's good. Only need very wise to this approach in order not to lose savings. And no need to invest in all sorts of fraudulent projects that promise great profit

Casino bankrolls can give you the returns you are talking about but they can give you those very same losses as well, since the casino business can be very variable, you could have months of profits and then in a single day you lose all your profits because a whale won big.