better to invest in bitcoin, gold maybe more secure, but bitcoin has more potential to grow
saving money in the bank, will only mean losing them in the long-term with the current high inflation
. In my suggestion saving in the bank is good also especially foreign currencies like dollar. When the value is gettting higher you can exchange it by your local currency and you gain profit. Sometimes people use to buy dollars and exchange it to block market when the currency exchange is too high.