In the bank investing money is safe but interest is only small. In bitcoins there is a lot of risk but if you invest in it you can easily earn 10% daily or 20% daily. But because of the volatile price you must be careful and risky. But if you will walk through each wave is easy to just earn it.
Yes agree bank investment is safer than bitcoin investment because mostly the fluctustion of market price is just minimal unlike bitcoin that it can easily fluctuate even in a very huge value.