Saving with banks are the worst options among your suggestions, not only will your savings lose its value but you're also enriching another organization while you get nothing. Banks make use of our savings for their businesses and keep the profits for themselves. The best choices would be to buy an assets and they're many if them that'll help with preserving the value of your savings.

If you feel buying of Bitcoin is too risky then you can go into real estate, the value of a land or properties on that piece of land will always appreciate in value over time so your savings will be adding value instead of getting hit with inflation and that's what happens when you open a deposit with the banks.