I believe bitcoin and banks are well renounced investment platforms but many people prefer bitcoin investment despite is very risky because of high demands and rising price interest and banks on the other hand saves millions of people finances all over the world yet their investment interest is very small but less risky than bitcoin. Which do you preferred your money to be save in as investment? Bitcoin or bank! What's your reason?
I would choose Bitcoin over Bank when it comes to investment.
I hold my own asset and have my own control over Bitcoin, yes it is risky that is why we have to manage it well and we could always cut loss when needed.
We could easily get the amount that we would earn in a year of investment in banks in a shorter spam of time in cryptocurrency, I know that it is riskier than banks but we choose to invest in order to earn money not to just let our money sleep in it.