Traditional banks do not make as much profit as we think they do. Most of them rely on loans and international exchange to make good profits in the banking system. Having a share in a bank would only potentially for more gains compared to investing in Bitcoin if the shares in that bank are above 5% or 10% anything below that is average. Investing in Bitcoin would give maximize profit if large money is invested in it, and over the years may be a decades or interval 5 years. Bitcoin would yield more potential compared to the shares any bank could give.
Ignore altcoins and shitcoins, and if we compare bitcoin to traditional investments, bitcoin is the best return investment I have ever seen. But the higher the profit, the higher the risk. Bitcoin has greater risk than investing in stocks or depositing money in banks, we should not deny that.
@OP, A few banks may go bankrupt during difficult economic times, but that does not mean the entire world banking system will collapse. We should remember that the banking system has been around for hundreds of years and has gone through various economic crises, while bitcoin is only 15 years old and hasn't even gone through any major crises yet. Therefore, rushing to judge bitcoin as safer than banks is completely wrong and biased.