That is not true in most of Europe.

Money you deposit in a bank is guaranteed by the state up to a certain limit (often 100 000€ per person per bank).

Source (french) : https://www.ecb.europa.eu/ecb/educational/explainers/tell-me...

> Selon la réglementation européenne, ces systèmes assurent 100 000 euros par déposant. > (DeepL) According to European regulations, these systems guarantee 100,000 euros per depositor.